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製品 (67)
P4KE350A-HF - 350V 400W TVS Diode DO-41 | Comchip Technology
The Comchip Technology P4KE350A-HF is a 400 W axial-leaded transient voltage suppressor (TVS) diode rated for a 350 V working standoff voltage, housed in a DO-204AL (DO-41) glass-passivated through-hole package. The "HF" suffix indicates halogen-free construction compliant with modern environmental directives. The device clamps voltage transients to a maximum of 482 V at the specified peak pulse current of 830 mA, providing robust protection for sensitive downstream electronics. A transient voltage suppressor (TVS) is a clamping semiconductor device designed to protect sensitive circuits from voltage spikes caused by lightning, inductive load kickback, electrostatic discharge (ESD), and other transient events. Within the protection hierarchy, TVS diodes sit alongside metal-oxide varistors (MOVs) and gas discharge tubes as fast-response suppressors, with TVS diodes favored for their sub-nanosecond response time, precise clamping voltage, and repeatable performance across thousands of surge cycles. Key specifications include a 350 V reverse standoff (Vrwm), 391 V minimum breakdown voltage, 432 V maximum breakdown voltage, and a maximum clamping voltage of 482 V at 830 mA peak pulse current (Ipp). The 400 W peak pulse power (Pppm) capability is rated for a 10/1000 µs waveform per the industry-standard TVS test protocol. Low reverse leakage below 1 µA above 10 V and a sub-nanosecond response time minimize quiescent loss and ensure effective suppression of fast transients. The DO-41 package uses a glass-passivated silicon die bonded between axial leads, providing high mechanical robustness and excellent thermal conductivity through the leads for heat dissipation during surge events. The unidirectional polarity (denoted by the "A" suffix) clamps positive transients to ground reference. Axial-lead construction supports easy through-hole PCB assembly and repairability, which is preferred in industrial and telecom protection circuits. Typical applications include 230 V AC mains protection at the secondary side of isolation transformers, industrial 24 V and 48 V DC bus transient suppression, telecommunications line protection, and protection for IGBT/MOSFET gate drivers and motor control circuits. Designers select the P4KE350A-HF when their working rail is at or below 350 V and the anticipated transients could otherwise exceed the breakdown rating of downstream semiconductors. When designing, ensure the selected TVS standoff voltage is at least 10-20% above the nominal operating rail to avoid leakage during normal operation. Place the TVS as close as possible to the connector or transient entry point, with short, wide traces to minimize parasitic inductance that can elevate the effective clamping voltage. This page synthesizes distributor pricing, parametric alternatives, and practical design notes not found in the manufacturer datasheet alone, providing engineers with actionable information for component selection and PCB layout optimization.
P4SMAJ45 - 45V 400W SMA TVS Diode, Unidirectional | Diotec
The Diotec P4SMAJ45 is a surface-mount unidirectional Transient Voltage Suppressor (TVS) diode housed in the industry-standard DO-214AC (SMA) package, designed to clamp inductive transients and ESD events on DC power rails in commercial and industrial equipment. It carries a working stand-off voltage (VRWM) of 45 V, a minimum breakdown voltage of 50 V, a peak pulse power dissipation of 400 W for a 10/1000 µs exponential waveform, and a maximum clamping voltage of 80.3 V at the specified peak pulse current of 5 A. The single-junction, glass-passivated chip delivers a tight clamping factor and is qualified for operation across -55 °C to +150 °C junction temperature. A Transient Voltage Suppressor (TVS) is a specialized clamping diode optimized to absorb brief, high-energy overvoltage transients such as those caused by inductive load switching, relay coil kickback, electrostatic discharge (ESD), or induced lightning surges. TVS diodes sit in parallel with the protected load, present a high impedance at normal operating voltage, and avalanche into low impedance once the breakdown threshold is exceeded. As a sub-family of discrete semiconductor protection devices, TVS parts belong to the broader Surge Protectors category within power management and circuit protection. P4SMAJ45 is one of the 400 W P4SMAJ series, distinguished from the lower-energy 400 W SMAJ series only by slightly different test conditions, while sharing the same SMA footprint and pinout. Key features include 400 W peak pulse power on a 10/1000 µs waveform, unidirectional polarity, glass-passivated junction construction, and compatibility with automated reflow soldering on standard SMA land patterns. Maximum clamping voltage of 80.3 V at 5 A (IPP) and low leakage at the 45 V working voltage keep steady-state losses negligible. Typical applications include 48 V telecom interface protection, 24/36 V industrial bus transient suppression, DC motor and solenoid snubbing, and protection of signal lines crossing electrically noisy factory environments. The 45 V stand-off rating suits rails whose nominal voltage sits below 45 V but which can experience switching spikes approaching the breakdown region. A common design pitfall is selecting a TVS whose stand-off voltage is too close to the normal operating rail; this shortens device life. Always derate the working voltage by at least 10 % to ensure the P4SMAJ45 only conducts during real transients. This page consolidates distributor pricing, same-package drop-in alternatives, and practical PCB layout notes to help engineers qualify P4SMAJ45 quickly into 48 V interface and industrial bus designs.
PESD3V3S5U - 5-Line 3.3V 200W ESD Protection Array | Nexperia
The Nexperia PESD3V3S5UD (PESD3V3S5U family) is a fivefold unidirectional ESD protection diode array rated for a 3.3 V reverse standoff voltage, 200 W peak pulse power, and a 12 V clamping voltage at 20 A (8/20 us waveform), housed in the 6-pin SOT-457 (SC-74 / TSOP) surface-mount plastic package. An ESD protection array is a multi-channel transient voltage suppressor (TVS) that shunts electrostatic discharge and cable-induced surge events away from sensitive downstream ICs. Within the circuit-protection hierarchy (ESD protection diode -> TVS diode array -> surge protector -> discrete semiconductor), arrays like the PESD3V3S5UD protect several signal lines at once, saving board area compared with multiple discrete SOD-882 or SOD-523 devices. Key features include the fivefold channel density in a single 2.9 x 1.3 mm footprint, a 3.3 V reverse standoff that suits 3.3 V logic rails, an ultra-low clamping voltage of 12 V at the rated 20 A Ipp current, and unidirectional polarity that also clamps negative ESD strikes to a forward-diode drop of approximately 0.7 V. Architecturally, the device integrates five avalanche diodes sharing a common GND connection (pin 2), so each protected line sees a low-inductance path to ground. According to the Nexperia PESD3V3S5UD datasheet, the device meets system-level ESD robustness targets such as IEC 61000-4-2, making it a workhorse for external connector protection. Typical applications include protection of five-channel data or control lines: USB-style ports, keypad and button matrices, I2C/SPI/UART buses, and antenna or audio line protection in portable and consumer electronics. Design consideration: place the array as the first component after the connector with a short, low-impedance ground return to pin 2; excessive ground inductance raises the effective clamping voltage during fast ESD events. This page synthesizes distributor pricing (as of 2026-09-11), drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
SD1271P6W - 12V Uni-Directional TVS Diode 2000W DFN1610-2
The Leiditech SD1271P6W is a 1-line uni-directional Transient Voltage Suppressor (TVS) diode rated for 2000 W peak pulse power in a compact DFN1610-2 (1.6 mm x 1.0 mm) surface-mount package. The device provides 12 V reverse working voltage (Vrwm), a 12.6 V minimum breakdown voltage (Vbr), 18 V maximum clamping voltage (Vc), and a typical 500 pF junction capacitance (Cj), making it suitable for transient suppression on DC power lines, USB interfaces, and signal interfaces exposed to ESD and surge events. The DFN1610-2 outline occupies less than 2 mm of board area, enabling TVS protection in space-constrained portable and wearable designs without a separate zener or MOV. According to the Leiditech datasheet, the SD1271P6W is engineered for single-line uni-directional clamping and is typically deployed at connector entries, IC pin protection nodes, and board-to-board interfaces where asymmetric surge response is acceptable. A Transient Voltage Suppressor (TVS) is a solid-state avalanche diode designed to clamp voltage transients — ESD, EFT, lightning-induced surges — to safe levels before they reach sensitive downstream components. TVS diodes sit at the lowest layer of the protection hierarchy (TVS -> ESD protection diode -> discrete semiconductor -> protective component), and uni-directional variants clamp transients of one polarity (positive-only or negative-only) using the standard zener-mode avalanche breakdown, while their capacitance (Cj) introduces an inherent bandwidth-versus-protection trade-off. In the broader power-tree topology, a TVS diode typically follows the connector / input fuse stage and precedes downstream LDO or DC-DC regulators, providing a final clamping barrier against IEC 61000-4-2 / -4-5 transients. Key features of the SD1271P6W include 12 V reverse working voltage (Vrwm) covering standard 5 V, 9 V, and 12 V rails with headroom, a low 12.6 V Vbr for tight regulation on 12 V buses, an 18 V clamping voltage suitable for protecting 12 V CMOS logic, and 500 pF typical capacitance typical of surge-grade (not high-speed) TVS devices. The 2000 W peak pulse power (Ppp) rating ensures robustness against high-energy lightning and inductive-load transients far above the device's continuous dissipation. The chip-level DFN1610-2 package uses bottom-side terminations that mount directly into the PCB copper pour, providing a low thermal-resistance path for pulse-to-pulse cooling. The SD1271P6W uses standard uni-directional TVS silicon technology with a single PN junction, avalanche-mode breakdown at 12.6 V, and dynamic resistance in the tens of ohms during clamping. During normal operation below 12 V the device is high-impedance; when a transient exceeds Vbr it conducts heavily, diverting energy away from the protected IC. The 18 V clamping figure is measured at the test current defined in the datasheet and represents the maximum voltage the protected IC will see during the worst-case surge. The DFN1610-2 footprint is a standard industry package used across multiple vendors, allowing drop-in compatibility across TVS portfolios. Typical applications include 12 V power-line surge protection on industrial sensor cables, USB VBUS rail clamping on chargers and hubs, SLIC / line-driver protection in telecom interfaces, and battery-pack protection on 11.1 V / 12 V Li-ion packs. The 12 V Vrwm and 12.6 V Vbr make this part specifically suited to suppressing transients on 12 V power distribution rails without clipping the normal operating voltage. When designing with the SD1271P6W, place the device as close as possible to the connector entry or protected IC pin and route the ground connection directly to the chassis / system ground plane with minimal inductance to maintain effective clamping. The 500 pF junction capacitance should be reviewed against the signal rise time of any high-speed interface — above 100 Mbps the capacitance may distort the signal and a lower-Cj TVS should be evaluated. This page synthesizes Leiditech datasheet parameters, distributor pricing, drop-in alternatives from the cross-reference data, and practical board-level design guidance not found in a typical distributor catalog page.
SD12C - 12V Bidirectional TVS Diode ESD Protection | Semtech
The Semtech SD12C is a 12 V bidirectional single-line TVS (Transient Voltage Suppressor) diode designed for ESD protection in portable electronics, housed in a compact SOD-323 surface-mount package. It delivers a 24 V clamping voltage at 15 A peak pulse current (8/20 µs waveform per IEC 61000-4-5) and is rated to absorb ESD strikes up to ±15 kV air discharge and ±8 kV contact discharge per the IEC 61000-4-2 standard. The SD12C replaces legacy multilayer varistors (MLVs) with a silicon device offering tighter clamping, lower leakage, and faster response. A TVS diode is a semiconductor protection device that clamps transient overvoltages to a safe level by avalanching when the voltage across it exceeds its breakdown threshold. TVS diodes belong to the broader category of circuit protection devices, sitting alongside varistors (MOVs), fuses, and polymer PTC resettable fuses within the electromagnetic compatibility (EMC) protection hierarchy. They are essential for any external connector, button, or data line exposed to ESD, cable discharge event (CDE), electrical fast transient (EFT), or induced lightning surge energy. Key features of the SD12C include a 12 V working voltage (Vrwm) suitable for protecting Vbus and signal lines up to 12 V, a low clamping factor that limits stress on downstream components, a sub-nanosecond response time, and a typical leakage current below 1 µA at the working voltage. The SOD-323 (SC-76) package occupies only 1.6 mm × 1.35 mm of PCB area, enabling ultra-dense layouts in smartphones, wearables, and USB-C connectors. Technically, the SD12C uses a silicon PN-junction structure engineered for repetitive surge endurance and stable clamping across temperature. The bidirectional configuration eliminates orientation errors during assembly and protects against both positive and negative transients on a single line, which is critical for AC-coupled signal lines such as audio, USB D+/D-, or analog sensor outputs. Typical applications include ESD protection for USB 2.0/3.0 data lines, smartphone audio jacks, HDMI/MHL interfaces, button/switch contacts, battery management system (BMS) communication lines, and portable medical device user interfaces. Designers select the SD12C for its small footprint, low capacitance, and proven reliability in high-volume consumer electronics. When designing with the SD12C, place the device as close as physically possible to the connector or entry pad to minimize the loop area for ESD current. Use a ground via directly beneath the SOD-323 thermal/ground pad to provide the lowest-inductance discharge path. Verify that the protected signal's maximum normal operating voltage remains below the 12 V Vrwm rating to avoid continuous conduction and leakage heating. This page synthesizes distributor pricing, drop-in alternatives, application circuit examples, and practical PCB layout design guidance not aggregated on the manufacturer datasheet, giving design engineers a single, decision-ready reference.
SD12C-01FTG - 12V 450W Bidirectional TVS Diode | Littelfuse
The Littelfuse SD12C-01FTG is a 450W bidirectional discrete TVS diode from the SD-C series, rated at a 12V working voltage and housed in a compact SOD-323 surface-mount package. It delivers 23V clamping at 17A (8/20µs) peak pulse current and is engineered to absorb repetitive ESD strikes at ±30kV contact discharge per IEC 61000-4-2 without performance degradation. According to the manufacturer datasheet, the device safely dissipates 30A (per the related SD05C variant) of 8/20µs induced surge current per IEC 61000-4-5 2nd Edition with very low clamping voltages. What is a bidirectional TVS diode? A Transient Voltage Suppressor (TVS) is a solid-state protection device that clamps voltage spikes to a safe level when the input exceeds its breakdown threshold. Bidirectional means it protects both positive and negative transients symmetrically, eliminating polarity orientation concerns during PCB assembly. In the broader hierarchy, TVS diodes sit within surge protectors, which fall under Discrete Semiconductors > Diodes, providing the last line of defense for downstream ICs. Key features include a 12V reverse standoff (Vrwm), 13.3V minimum breakdown (Vbr) and 450W peak pulse power (Ppp) on a 10/1000µs waveform. The SOD-323 (SC-76) footprint measures approximately 1.7mm x 1.25mm, enabling high-density placement on data line protection channels. The device offers low leakage current (<1µA at Vrwm) and a fast sub-nanosecond response time typical of avalanche-mode TVS technology. The SD12C-01FTG uses avalanche breakdown physics in a silicon PN junction, achieving a sub-nanosecond clamping response that begins before the protected IC can latch up or fail. Compared with varistors, TVS diodes offer tighter clamping tolerances, lower capacitance, and no wear-out mechanism over rated surge events. Typical applications include USB 2.0/3.0 data line protection, HDMI port ESD clamps, mobile handset charging port TVS, industrial CAN bus protection, and 12V automotive sensor interfaces. Its automotive-grade qualification makes it suitable for body electronics and infotainment links. When designing with the SD12C-01FTG, route the protected trace directly through the device with the shortest possible ground return path to maximize surge absorption. Place the TVS within 3mm of the connector to minimize loop inductance, and pair it with a series ferrite or PTC for combined ESD + overcurrent defense. This page synthesizes distributor pricing, drop-in alternatives, and practical layout notes not found in the manufacturer datasheet alone.
SE10F10B5.0A - 5V Bidirectional ESD Diode | SEMIWILL | DFN1006
The SEMIWILL SE10F10B5.0A is an ultra-small bidirectional ESD (electrostatic discharge) protection diode designed to safeguard 5V high-speed interfaces from transient voltage threats. Housed in a compact DFN1006-2L package (1.0 mm x 0.6 mm), it delivers an 8 A peak pulse current capability while maintaining ultra-low capacitance that preserves signal integrity on USB 2.0, HDMI, and other high-speed data lines. An ESD protection diode is a specialized transient voltage suppressor (TVS) that clamps fast-rising voltage spikes to safe levels, preventing damage to sensitive downstream ICs. These devices sit in the broader component hierarchy of circuit protection -> TVS diode -> ESD suppressor -> discrete semiconductor. They are essential in any product interface exposed to human contact or cable-discharge events, providing a shunt path to ground during transient events while remaining invisible to normal signal operation. Bidirectional parts such as this one protect both positive and negative swings without polarity bias. Key features of the SE10F10B5.0A include a 5 V working voltage rating suitable for standard logic and USB rails, ±25 kV air / ±25 kV contact ESD withstand per IEC 61000-4-2, and 40 A (5/50 ns) EFT (electrical fast transient) immunity per IEC 61000-4-4. The ultra-low capacitance minimizes insertion loss on USB 2.0 (480 Mbps) and HDMI 1.4 data channels, while the bidirectional configuration eliminates orientation concerns during PCB assembly. The device leverages a silicon avalanche-breakdown TVS architecture that achieves sub-nanosecond response time to clamp transients well before IC damage thresholds are exceeded. Its DFN1006-2L footprint is the industry standard for single-line protection, enabling drop-in substitution on existing PCB layouts without board rework. Typical applications include USB 2.0/3.0 port protection on smartphones and laptops, HDMI/MIPI/LVDS interface protection on displays, audio headset jacks, SIM card interfaces, and push-button/keypad ESD protection. The device is also well-suited for IoT sensor nodes, wearables, and any portable consumer device requiring compact, low-capacitance transient protection. When designing with this part, place it as close as possible to the external connector with short, direct ground return traces to the chassis or system ground. A typical 0402-style ground stitch via immediately adjacent to the GND pad dramatically improves ESD clamping performance; long return paths create inductive overshoot that can re-couple into protected signals. This page synthesizes distributor stock, IEC compliance ratings, drop-in DFN1006-2L alternatives, and PCB-layout design notes not consolidated in the manufacturer datasheet alone.
SE10P3F10U5.0MB - 5V TVS/ESD Diode Array DFN1006-3L | Semiware
The Semiware SE10P3F10U5.0MB is a single-channel 5V TVS/ESD protection diode array in a DFN1006-3L (1.0mm x 0.6mm) surface-mount package, designed to clamp electrostatic discharges on high-speed signal lines. It offers a working voltage of 5V, low leakage current, and a sub-nanosecond response time, and it is rated to withstand IEC 61000-4-2 ESD strikes of plus or minus 17kV (air) and plus or minus 15kV (contact), plus IEC 61000-4-4 EFT transients of 40A (5/50ns). A TVS (Transient Voltage Suppressor) diode array is a unidirectional or bidirectional protection device that shunts fast overvoltage transients to ground, clamping the line to a safe voltage and protecting downstream CMOS or analog ICs. As a sub-family of surge protectors, TVS arrays sit inside the broader discrete semiconductor taxonomy: TVS/ESD diode -> surge protector -> discrete semiconductor -> semiconductor. They are typically placed at connector entry points and high-speed data lines where external cable-borne transients are most likely to couple in. Key features of the SE10P3F10U5.0MB include the 5V standoff voltage suitable for HDMI, USB 2.0, VGA and similar high-speed interfaces, a sub-nanosecond response time, a low clamping voltage under surge, and a tiny DFN1006-3L footprint that places the protection within 2mm of the connector for minimum loop inductance. The device is built on Semiware's planar TVS process optimized for low capacitance and high surge-current handling. Technical depth: the array uses a steering-diode plus clamp-Zener topology. Each I/O line is clamped by an internal TVS element that conducts during a transient, while steering diodes route positive surges to VCC and negative surges to GND. The 5.0V working voltage aligns with common logic levels and is below the typical 5.5V supply rail, ensuring that normal signal swings do not turn on the protector. Typical applications include HDMI/USB/VGA port ESD protection, smartphone and tablet charging-port protection, and any 5V high-speed signal line exposed to user contact. The ultra-compact DFN1006-3L package is ideal for space-constrained mobile designs where every square millimeter matters. When designing with this device, place the protection array as close as possible to the connector body and use a ground via directly beneath the package thermal/exposed pad. Avoid routing protected traces under the array, and pair it with a bulk TVS at the system entry point for two-stage protection. This page synthesizes distributor availability, drop-in alternatives, and application notes not found in the manufacturer datasheet.
SE16F200U12A - 12V ESD TVS Array, DFN1610-2L | Semiware
The Semiware SE16F200U12A is a 12V working-voltage, multi-channel electrostatic discharge (ESD) suppressor diode array housed in a compact DFN1610-2L surface-mount package. It is engineered to clamp fast transient overvoltages on high-speed data lines, with an ultra-low capacitance profile that preserves signal integrity on USB, HDMI, and other high-speed interfaces. The device combines low leakage current, sub-nanosecond response time, and high reliability in a footprint optimized for portable and densely routed PCB designs. An ESD TVS (Transient Voltage Suppressor) diode is a specialized protection device that shunts electrostatic discharge events away from sensitive downstream circuitry. When a transient voltage spike exceeds the device's breakdown threshold, the TVS diode clamps the line to a safe voltage within nanoseconds, dissipating the energy as heat. ESD arrays such as the SE16F200U12A integrate one or more TVS elements into a single package and are commonly deployed on external connector pins, USB data lines, and SIM/socket interfaces. Within the broader product hierarchy, this part sits as: ESD protection diode -> TVS diode array -> circuit protection -> discrete semiconductor. Key features include a 12V reverse working voltage (Vrwm), low leakage current for battery-powered applications, and an industry-standard DFN1610-2L footprint. The compact 1.6 mm x 1.0 mm package is well suited for handheld devices, wearables, and any PCB layout where board area is at a premium. The device supports both unidirectional and bidirectional (depending on variant suffix) clamping topologies. Technically, the SE16F200U12A uses Semiware's proprietary TVS process technology optimized for fast turn-on and low dynamic resistance. The low junction capacitance minimizes insertion loss on high-speed signal paths, which is critical for maintaining eye-diagram margins on USB 3.0, HDMI 1.4/2.0, and other multi-Gbps interfaces. Designers typically place the device as close as possible to the external connector to maximize protection effectiveness. Typical applications include HDMI/USB/VGA port protection in smartphones and laptops, SIM card slot ESD clamping, portable consumer electronics I/O safeguarding, and high-speed signal line transient suppression in IoT and wearable products. Designers favor this part when board space is at a premium and signal integrity must be preserved simultaneously. When designing with this device, place the TVS as close to the connector as the PCB layout allows and keep the ground return path short and direct. Use a low-inductance PCB pad pattern and provide adequate copper area for thermal dissipation during repeated ESD strikes.
SM15T10AY - 1500W TVS Diode, 10V Standoff | STMicroelectronics
The SM15T10AY is a 1500W transient voltage suppression (TVS) diode from STMicroelectronics, designed to protect sensitive electronic circuits from voltage transients induced by lightning, inductive load switching, and electrostatic discharge (ESD). It features a standoff voltage of 10V (working peak reverse voltage) and a breakdown voltage range of 11.1V to 12.3V at 1mA test current. The device is housed in the SMC (DO-214AB) package, a surface-mount package with a compact footprint suitable for high-density PCB designs. A TVS diode is a clamping device that, when exposed to a transient voltage exceeding its breakdown voltage, conducts high current to clamp the voltage to a safe level, thereby protecting downstream components. TVS diodes are essential in power supply inputs, communication lines, and automotive electronics where transient surges are common. They are part of the broader category of circuit protection devices, which also includes varistors, gas discharge tubes, and ESD suppressors. Key features of the SM15T10AY include a peak pulse power dissipation of 1500W (10/1000us waveform), a maximum clamping voltage of 18.6V at 83A peak pulse current, and a low leakage current of 200uA at the standoff voltage. The device operates over a junction temperature range of -55C to +150C, making it suitable for harsh environments. It is RoHS compliant and halogen-free, meeting modern environmental standards. The SM15T10AY utilizes a silicon avalanche diode structure, providing fast response times (typically less than 1ns) and high surge capability. The SMC package offers excellent thermal performance, with a thermal resistance of 15C/W (junction to lead), enabling efficient heat dissipation during surge events. The device is AEC-Q101 qualified, making it suitable for automotive applications where reliability under extreme conditions is critical. Typical applications include automotive electronic control units (ECUs), industrial power supplies, telecom equipment, and consumer electronics. In automotive systems, the SM15T10AY protects sensitive microcontrollers and sensors from load-dump transients and ESD. In industrial power supplies, it safeguards rectifier circuits and DC-DC converters from lightning-induced surges. When designing with the SM15T10AY, ensure adequate PCB copper area for heat dissipation during surge events. The device should be placed as close as possible to the protected component or connector to minimize parasitic inductance. For high-reliability designs, consider derating the peak pulse power at elevated ambient temperatures.
SM15T56AY - 56V 1500W TVS Diode | STMicroelectronics | Automotive
The SM15T56AY is a 1500W transient voltage suppression (TVS) diode from STMicroelectronics, designed to protect sensitive electronic circuits from voltage transients induced by lightning, inductive load switching, and electrostatic discharge (ESD). It features a standoff voltage of 56V (working peak reverse voltage) and a breakdown voltage range of 62.2V to 68.8V at 1mA test current. The device clamps transient overvoltages to a maximum clamping voltage of 100V at a peak pulse current of 15.4A (for a 10/1000μs waveform), ensuring downstream components remain within safe operating limits. A TVS diode is a semiconductor device that responds to overvoltage conditions by entering avalanche breakdown, shunting excess current to ground and clamping the voltage to a safe level. TVS diodes are essential in power management and circuit protection hierarchies, sitting between the external threat (ESD, surge) and the sensitive load (ICs, microcontrollers). They are categorized under transient voltage suppressors, which are a subset of protection diodes within the broader family of discrete semiconductors. The SM15T56AY is part of the SM15T series, which offers peak pulse power ratings from 600W to 1500W, with the 'A' suffix indicating a unidirectional (single-direction) device. Key features include a peak pulse power dissipation of 1500W (10/1000μs), a fast response time of less than 1 picosecond (theoretical), and a low leakage current of 5μA maximum at the standoff voltage. The device is housed in a compact SMC (DO-214AB) package, which is surface-mountable and provides excellent thermal performance. The SM15T56AY is AEC-Q101 qualified, making it suitable for automotive applications where reliability under harsh conditions is critical. It also meets RoHS and REACH compliance standards, ensuring environmental friendliness. Technically, the SM15T56AY uses a planar epitaxial silicon structure that provides precise breakdown voltage control and high surge capability. The device's clamping behavior is characterized by its dynamic resistance, which is low enough to minimize voltage overshoot during fast transients. The unidirectional configuration is ideal for DC power rails where the voltage is always positive with respect to ground, offering a single clamping direction and lower clamping voltage compared to bidirectional devices. Typical applications include automotive electronic control units (ECUs), industrial power supplies, telecommunications equipment, and consumer electronics. In automotive systems, the SM15T56AY protects 12V and 24V battery lines from load-dump transients and inductive spikes. In industrial settings, it safeguards PLCs and motor drives from surge events. The device's high surge capability and fast response make it a preferred choice for protecting power input stages. When designing with the SM15T56AY, ensure the standoff voltage (56V) is higher than the maximum steady-state operating voltage of the protected line to avoid unnecessary clamping during normal operation. Place the TVS diode as close as possible to the protected component or connector to minimize parasitic inductance, which can degrade clamping performance. Proper PCB layout with short, wide traces to the TVS and a solid ground plane is essential for optimal transient suppression.
SM4T33A - 33V 400W TRANSIL TVS Diode | STMicroelectronics
The STMicroelectronics SM4T33A is a 33V unidirectional TRANSIL transient voltage suppressor (TVS) diode rated for 400W peak pulse power dissipation on a 1ms exponential waveform, packaged in the surface-mount SMA (DO-214AC) outline. It belongs to ST's SM4T series, which is JEDEC-registered and designed for high-overvoltage protection by clamping action in sensitive electronics. A TRANSIL is a specific class of avalanche TVS diode whose role is to clamp transient overvoltages (ESD, inductive load switching, lightning-induced surges) to a safe level, protecting downstream semiconductors. TVS diodes sit within the broader protection-component hierarchy of surge protectors, which themselves fall under discrete semiconductors used in power management and interface protection. SM4T-series parts are positioned as general-purpose surface-mount TVS diodes with a low clamping factor and a fast response time, intermediate in power handling between SMA-packaged 400W parts and larger SMB/SMC 1000W-1500W parts. Key electrical features of the SM4T33A include a stand-off voltage (VWM) of 33V, a minimum breakdown voltage (VBR min) around 36.7V, a maximum clamping voltage (VC) of approximately 53.3V at IPP, and a peak pulse current handling compatible with the 400W/1ms rating. The device is offered in unidirectional (-A suffix) and bidirectional (-CA suffix) variants, providing flexibility for DC rail protection and AC line protection respectively. The low clamping factor minimizes the voltage excursion seen by protected circuitry during a transient event. Architecturally, the SM4T33A uses a silicon pn-junction avalanche structure optimized for fast turn-on (typically sub-nanosecond response), and the SMA package's C-bend terminations provide a robust solder joint capable of withstanding the thermal stress of repeated surge events. Maximum junction temperature is 150C with operating range typically -55C to +150C (per the SMA TRANSIL datasheet family). Typical applications include DC power rail protection in 24V industrial systems, protection of microcontroller I/O pins, secondary protection on telecom line interfaces, USB and CAN bus protection, and general ESD/surge protection on PCB signal lines exposed to external cables. The unidirectional polarity suits DC rails, while bidirectional variants suit AC or signal-line applications. When designing with the SM4T33A, ensure the working voltage is below VWM and that the protected device's maximum rating exceeds VC. Place the TVS as close as possible to the entry point of the transient, with short, wide PCB traces to minimize parasitic inductance that would otherwise let voltage overshoot during fast-edge transients. This page synthesizes distributor pricing, drop-in SMA-package alternatives, and practical PCB-layout design notes not collected in the manufacturer datasheet alone, giving the engineer a single reference for sourcing and design-in decisions.
SM6T250CAY - 250V 600W TVS Diode | STMicroelectronics
The SM6T250CAY is a bidirectional transient voltage suppression (TVS) diode from STMicroelectronics, designed to protect sensitive electronic circuits from voltage transients induced by lightning, inductive load switching, and electrostatic discharge (ESD). It offers a standoff voltage of 250V and a peak pulse power dissipation of 600W (10/1000µs waveform), making it suitable for industrial, automotive, and telecom applications. The device is available in the compact SMB (DO-214AA) surface-mount package, which is widely used for board-level protection. A TVS diode is a clamping device that limits voltage spikes to a safe level by entering avalanche breakdown when the voltage across it exceeds its breakdown voltage. It is a type of voltage suppressor, which falls under the broader category of circuit protection components. TVS diodes are essential in protecting integrated circuits, power supplies, and communication lines from overvoltage events that could otherwise cause permanent damage. Key features of the SM6T250CAY include a working peak reverse voltage (VRWM) of 250V, a minimum breakdown voltage (VBR) of 285V, and a maximum clamping voltage (VC) of 417V at the peak pulse current (IPP) of 14.4A. The device has a low leakage current of 5µA at VRWM, ensuring minimal power loss in standby. It also features a fast response time of less than 1ns, which is critical for protecting high-speed data lines. The SMB package offers a compact footprint with a height of only 2.44mm, making it suitable for space-constrained designs. The SM6T250CAY is fabricated using STMicroelectronics' planar technology, which ensures precise voltage control and high reliability. The device is AEC-Q101 qualified, making it suitable for automotive applications where reliability under harsh conditions is paramount. It also complies with RoHS and REACH directives, ensuring environmental friendliness. The bidirectional configuration allows it to clamp both positive and negative transients, making it ideal for AC lines and applications where the polarity of the transient is unknown. Typical applications include automotive electronic control units (ECUs), industrial automation equipment, telecom infrastructure, and power supply protection. In automotive systems, the SM6T250CAY protects against load dump transients and ESD events, ensuring the longevity of sensitive electronics. In industrial settings, it safeguards PLCs and motor drives from inductive spikes. For telecom, it protects line cards and communication interfaces from lightning-induced surges. When designing with the SM6T250CAY, ensure that the standoff voltage (250V) is higher than the maximum operating voltage of the protected line to avoid unnecessary clamping. Also, consider the peak pulse power rating (600W) and derate it based on the operating temperature. Proper PCB layout with short, low-inductance traces is essential to minimize parasitic effects and ensure effective clamping.
SMA4F5.0AY - 5.0V TVS Diode, SMA Flat Package | STMicroelectronics
The SMA4F5.0AY is a 5.0V unidirectional Transient Voltage Suppression (TVS) diode from STMicroelectronics, designed to protect sensitive electronic circuits from voltage transients induced by lightning, inductive load switching, and electrostatic discharge (ESD). It is housed in a compact SMA flat package (SMAflat), which offers a low-profile, surface-mount solution with excellent power dissipation capability. The device provides a standoff voltage of 5.0V and a breakdown voltage range of 6.4V to 7.0V, ensuring robust clamping performance for low-voltage applications. A TVS diode is a semiconductor device that clamps transient voltages to a safe level by entering avalanche breakdown when the voltage exceeds its breakdown voltage. It is a critical component in circuit protection, acting as a voltage clamp that diverts excess energy away from sensitive ICs, microcontrollers, and communication interfaces. TVS diodes are part of the broader category of circuit protection devices, which also include varistors, ESD suppressors, and gas discharge tubes. In the system hierarchy, a TVS diode is a fundamental building block in the protection layer of electronic systems, working alongside fuses and current limiters to ensure reliability and safety. Key features of the SMA4F5.0AY include a peak pulse power dissipation of 400W (10/1000µs waveform), a low clamping factor, and a fast response time of less than 1ns. The device operates over a wide temperature range of -55°C to +150°C, making it suitable for harsh environments. Its SMAflat package is designed for automated assembly, with a height of only 1.0mm, ideal for space-constrained applications. The device is RoHS compliant and halogen-free, meeting modern environmental standards. Technically, the SMA4F5.0AY utilizes a planar epitaxial structure that ensures low leakage current and high surge capability. The device's clamping voltage at peak pulse current is typically 9.2V, providing effective protection for 5V logic and power rails. The TVS diode's bidirectional or unidirectional configuration is determined by the application; the SMA4F5.0AY is unidirectional, making it suitable for DC power lines and signal lines where the voltage is always positive. Typical applications include protection of power supply inputs, I/O ports, and communication lines in consumer electronics, industrial control systems, automotive electronics, and telecommunications equipment. For example, in a USB power port, the SMA4F5.0AY can be placed across the VBUS line to clamp ESD events, ensuring the downstream controller remains undamaged. When designing with this device, it is essential to place the TVS diode as close as possible to the protected connector or IC to minimize parasitic inductance. Additionally, the PCB layout should include a low-impedance ground path to ensure effective clamping. The device's standoff voltage should be higher than the maximum operating voltage of the protected line to avoid unnecessary conduction during normal operation.
SMA6J43CA - 600W Bidirectional TVS Diode 43V | Littelfuse
The Littelfuse SMA6J43CA is a 600 W bidirectional transient voltage suppressor (TVS) diode with a 43 V reverse standoff voltage, 47.7 V minimum breakdown voltage, and 69.4 V maximum clamping voltage at 8.7 A peak pulse current, housed in a DO-214AC (SMA) surface-mount package. A TVS diode is a silicon avalanche protection device clamped in parallel with the circuit it protects. Within the power-management hierarchy, it belongs to the surge protector family alongside varistors and gas discharge tubes; unlike MOVs, silicon TVS diodes respond in picoseconds with tightly controlled clamping voltages, making them the preferred choice for protecting sensitive semiconductors from electrostatic discharge (ESD), inductive load switching, and lightning-induced transients. Key features include the 600 W peak pulse power rating (10/1000 us waveform), bidirectional polarity that blocks and clamps in both directions, 5% breakdown voltage tolerance, and a steady-state power dissipation of 5.0 W. The glass-passivated junction ensures long-term reliability, and the response time is typically less than 1.0 ns, fast enough to intercept ESD events per IEC 61000-4-2 type threats. The SMA6J43CA uses a planar, glass-passivated avalanche junction structure. Its bidirectional construction consists of two avalanche junctions in series-opposed configuration, giving symmetric clamping at 69.4 V for both positive and negative surge events - important for AC lines, symmetric signal pairs, and circuits that see reverse transients. Typical applications include automotive 42 V rail transient protection, industrial 24-36 V DC bus clamping, telecom line cards, and surge protection on power input stages of motor drives and power supplies. The 43 V standoff accommodates nominal 36-40 V rails with margin. Design consideration: at 8.7 A peak, the package must dissipate the surge energy into copper - provide at least adequate PCB copper area on both SMA terminals. Remember the bidirectional CA suffix means leakage flows in both directions; use the unidirectional SMA6J43A for DC rails where a clamping diode forward drop is acceptable. This page synthesizes verified distributor data, drop-in cross-brand alternatives, and practical design notes not found in the manufacturer datasheet.
SMA6J43CA-Q - 600W 43V Bidirectional TVS Diode | Bourns
The Bourns SMA6J43CA-Q is a 600 W bidirectional transient voltage suppressor (TVS) diode with a 43 V working standoff voltage, 69.4 V max clamping voltage, and 8.7 A peak pulse current capability, housed in a surface-mount DO-214AC (SMA) package. The -Q suffix denotes AEC-Q101 qualification for automotive-grade reliability. A transient voltage suppressor diode is a circuit-protection semiconductor designed to clamp fast voltage transients, such as those caused by inductive load switching, lightning-induced surges, and electrostatic discharge (ESD). TVS diodes sit within the broader voltage-suppression hierarchy that spans varistors, gas discharge tubes, and TVS thyristors. When a transient exceeds the breakdown voltage, the TVS avalanches within nanoseconds and diverts surge current to ground, clamping the protected rail to a safe level. Key features of the SMA6J43CA-Q include 600 W peak pulse power per the 10/1000 us waveform, 5% breakdown voltage tolerance, bidirectional polarity for AC lines and symmetric signal protection, and a glass-passivated junction for long-term stability. The SMA package supports surface-mount reflow assembly and roughly 5.0 W steady-state power dissipation. The SMA6J-Q series is specified for voltage transient and ESD protection in data lines and DC power supplies. Typical applications include automotive 24 V and 42 V rail protection, industrial DC bus clamping, telecom line cards, and surge protection at power input connectors of harsh-environment equipment. When designing with this device, remember that the 43 V standoff means the diode begins conducting near 47.8 V minimum breakdown; downstream circuits must tolerate the 69.4 V worst-case clamp at full 8.7 A surge. Ground-path inductance must be minimized so the clamp voltage is not inflated during fast transients. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
SMA6S18CAH - 18V Bi-Directional 600W TVS Diode | TSC
The Taiwan Semiconductor Corporation SMA6S18CAH is a 600 W bi-directional Transient Voltage Suppressor (TVS) diode rated for an 18 V working standoff voltage, packaged in the compact surface-mount SOD-128 case. Designed to clamp fast transient events such as ESD surges, inductive load switching, and lightning-induced transients, the device offers a peak pulse current capability of 20.5 A (Ipp) and a maximum clamping voltage of 29.2 V at that current. A Transient Voltage Suppressor is a specialized PN-junction diode optimized for avalanche breakdown operation. Under normal circuit conditions the TVS diode presents a high impedance and is effectively invisible to the signal or supply rail it protects. When the voltage across the device exceeds its breakdown (avalanche) voltage, the TVS diode conducts heavily and shunts the transient energy away from sensitive downstream components. Bi-directional TVS diodes such as the SMA6S18CAH clamp both positive and negative transients symmetrically, making them ideal for AC-coupled signal lines, differential data pairs, and DC supply rails where the polarity of the disturbance is undefined. Key electrical characteristics include a stand-off voltage (Vrwm) of 18 V, breakdown voltage (Vbr) typically 20 V, and a clamping voltage (Vc) of 29.2 V at 20.5 A peak pulse current. The 600 W peak pulse power rating is specified at a 10/1000 microsecond waveform per industry-standard TVS test methods. The device is housed in a SOD-128 (also known as SMA-flat) low-profile surface-mount package that is pin-compatible with the industry-standard SMA footprint, enabling direct substitution on existing PCB land patterns. Typical applications include protection of 12 V or 15 V DC power rails in industrial control systems, automotive electronic control units (ECUs), USB and HDMI data-line protection, and protection of signal lines on factory automation buses such as RS-485 and CAN. The fast response time (sub-nanosecond avalanche) makes the SMA6S18CAH well-suited for safeguarding microcontroller I/O pins and sensor interfaces from electrostatic discharge events. When designing with this device, ensure the working standoff voltage (Vrwm) exceeds the maximum continuous operating voltage of the protected line, and select a clamping voltage (Vc) safely below the absolute maximum rating of the downstream component. PCB layout should minimize parasitic inductance between the TVS diode and the protected line, with short, wide traces to the ground plane to ensure effective transient energy dissipation.
SMBJ15CA - 600W Bidirectional TVS Diode, 15V, DO-214AA | SMBJ Series
The Littelfuse SMBJ15CA is a 600W peak-pulse-power bidirectional Transient Voltage Suppressor (TVS) diode housed in a surface-mount DO-214AA (SMB) package. Designed for bipolar operation, it offers a working standoff voltage of 15.0V, a breakdown voltage of approximately 16.7V, and a maximum clamping voltage of 24.4V at a peak pulse current of 24.6A (10/1000 µs waveform). The 'C' suffix denotes bidirectional construction, allowing it to clamp transients of either polarity across the protected line. A TVS diode is a clamping semiconductor device that protects sensitive downstream electronics by absorbing high-energy voltage transients (such as those induced by lightning, ESD, inductive load switching, or relay kickback) and shunting the surge current to ground. Within the broader component taxonomy, a TVS diode is a sub-category of surge protection devices, which fall under the discrete semiconductor family. TVS diodes complement, but do not replace, over-current protection: they react in nanoseconds and are the fastest solid-state surge clamp available, far faster than MOVs or GDTs. Key features include 600W peak pulse power (10/1000 µs), 24.6A peak pulse current, a tight ±5% breakdown tolerance, low incremental surge resistance, and a robust glass-passivated die construction. The DO-214AA package offers an industry-standard SMB footprint compatible with all major second-source suppliers, including Vishay, STMicroelectronics, Diodes Incorporated, Micro Commercial Components (MCC), Microchip, and Bourns. Technically, the SMBJ15CA is built on a junction-passivated PN structure optimized for fast avalanche breakdown. Its response time is sub-nanosecond, and its clamping ratio (Vc/Vbr) of approximately 1.46 reflects the device's low dynamic impedance during a surge event. The bidirectional design eliminates the need for orientation on the PCB, simplifying assembly. Typical applications include 12V/15V rail protection in industrial control systems, DC power supply outputs exposed to load dump transients, telecom line protection, USB and CAN bus protection, sensor input clamping, and secondary protection downstream of GDTs or PTCs. When designing with this device, ensure the trace width to the SMB pads can carry the rated peak pulse current (24.6A) and that the PCB thermal mass keeps the junction temperature within rated limits during repeated surge events. Pair with an upstream fuse or PTC for over-current coordination. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not consolidated in any single manufacturer datasheet.
SMBJ15CA-TR - 600W 15V Bidirectional TVS Diode | STMicroelectronics
The STMicroelectronics SMBJ15CA-TR is a 600 W peak-pulse bidirectional TRANSIL transient voltage suppressor (TVS) diode rated at 15 V standoff, housed in a surface-mount SMB (DO-214AA) package. It clamps transients to a maximum 24.4 V across its leads while handling up to 25.1 A of peak pulse current on a 10/1000 us waveform, making it well suited for hard-to-protect DC rails and signal lines in industrial, automotive, and consumer equipment. A TVS diode is a specialized clamping semiconductor placed in parallel with a sensitive load. Under normal operation it presents a high impedance, but when the line voltage exceeds its breakdown threshold it avalanches rapidly, diverting transient energy away from downstream circuitry. TVS diodes sit hierarchically within circuit protection components (TVS -> protection diode -> discrete semiconductor -> semiconductor). They are the fastest-responding overvoltage clamp available, with sub-nanosecond turn-on and the ability to absorb multi-kW pulses that would destroy Zener-based or MOV solutions. Key specifications of the SMBJ15CA-TR include a 15 V working standoff voltage (VWM), 16.7 V minimum breakdown voltage (VBR), and a 25.1 A peak pulse current (IPP) at 10/1000 us. Clamping voltage (VC) is 24.4 V maximum at IPP, and leakage current at VWM is below 1 uA. The part is bidirectional (suffix "CA"), so the same orientation works for positive or negative-going transients. It is qualified to IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and MIL STD 883 method 3015 standards, fulfilling EMI/ESD immunity requirements for most electronics designs. Typical applications include 12-15 V DC rail protection in PLCs and industrial sensors, USB/VBUS clamps, RS-485 and CAN bus transient suppression, secondary protection on telecom line cards, and automotive 12 V load-dump networks (when paired with a higher-rated companion). The SMB package provides a low thermal resistance path to the PCB copper pad, allowing the pulsed energy to be absorbed without degrading the die. When laying out the SMBJ15CA-TR, keep the body as close to the protected connector or rail as possible and maximize the copper area on both pads to keep the clamp voltage low during high-current pulses. A nearby 1 nF-100 nF ceramic bypass capacitor suppresses residual high-frequency ringing.
SMBJ28CA-E3/52 - 28V 600W Bidirectional TVS Diode | Vishay SMB
The Vishay SMBJ28CA-E3/52 is a 600 W surface-mount TRANSZORB Transient Voltage Suppressor (TVS) in a bidirectional configuration, packaged in the DO-214AA (SMB) footprint. It features a 28 V typical reverse standoff voltage (Vrwm), a 31.1 V minimum breakdown voltage, and clamps transients at 45.5 V while conducting up to 13.2 A of peak pulse current (Ipp) on a 10/1000 µs waveform. A Transient Voltage Suppressor (TVS) is a clamping semiconductor device engineered to shunt fast voltage transients away from sensitive electronics. Within the power-protection hierarchy, a TVS sits between passive suppressors (varistors, TVS diodes) and active protection ICs (eFETs, hot-swap controllers). Bidirectional TVS parts like the SMBJ28CA-E3/52 are built on a glass-passivated chip junction, giving them symmetrical V-I characteristics and making them ideal for AC or differential DC signal lines where neither polarity can be excluded. Key features include ±5 % breakdown voltage tolerance (VBR), 600 W peak pulse power on a 10/1000 µs waveform, a low-profile SMB body suitable for automated pick-and-place, and a glass-passivated die for long-term reliability. The Vishay SMBJ-C series is qualified for AEC-Q101 automotive variants and supports both uni- and bidirectional parts, simplifying BOM across mixed-polarity rails. The device uses a planar PN-junction avalanche architecture. During a transient event, the junction enters avalanche breakdown at VBR and clamps the line to its rated clamping voltage Vc, dissipating the transient energy as heat. The 0.01 % duty-cycle rating and fast response (<1 ns) make it well suited to repetitive ESD and inductive-switching surges without thermal fatigue. Typical applications include protection of 24 V industrial buses, automotive 12 V/24 V powertrain lines, RS-485/RS-232 transceivers, and DC-DC converter input rails. Its 600 W rating also covers most lightning-induced surge requirements on outdoor equipment. The bidirectional behavior lets a single part protect both polarities of a differential pair, reducing component count. When designing in this part, verify that the working voltage of the protected rail stays below 28 V continuous and that the maximum clamping voltage 45.5 V does not exceed the absolute maximum rating of the downstream IC. Route the TVS as close as possible to the connector or vulnerable pin, with short, wide traces to minimize parasitic inductance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineers with a faster path from selection to production.
SMBJ5.0A - 600W 5V TVS Diode, DO-214AA | Littelfuse
The Littelfuse SMBJ5.0A is a 600 W unidirectional TVS (transient voltage suppressor) diode with a 5.0 V reverse stand-off voltage, 6.4 V to 7.0 V breakdown voltage range, and a maximum clamping voltage of 9.2 V at 65.3 A peak pulse current, housed in the surface-mount DO-214AA (SMB) package. A TVS diode is a silicon avalanche protection device placed across sensitive circuit nodes to clamp fast high-energy transients such as ESD, EFT, inductive load switching spikes, and lightning-induced surges. Within the power-protection hierarchy, TVS diodes sit above small ESD arrays in surge capability and are a core element of any input-protection subsystem in a power management design. Key features of the SMBJ5.0A include the industry-standard 600 W peak pulse power rating (10/1000 us waveform), very fast response to transient events, low clamping voltage for a 5 V rail, and glass-passivated junction construction for reliability. The unidirectional polarity makes it ideal for low-voltage DC lines where the transient has a defined polarity. Technically, the device exploits the silicon avalanche breakdown effect: below the breakdown voltage it is essentially non-conducting with low leakage, and during a surge it avalanches in nanoseconds, diverting the surge current to ground while holding the node near the 9.2 V maximum clamp. This protects downstream ICs, MOSFETs, and signal interfaces that exceed a 5 V absolute maximum rating. Typical applications include 5 V DC power-input protection in consumer electronics, transient suppression on 24 V industrial control signal lines with series current limiting, automotive low-voltage rail protection, and surge immunity design per IEC 61000-4-2 and IEC 61000-4-4 test environments as cited by STMicroelectronics for the same SMBJ series. Design consideration: the SMBJ5.0A clamps at up to 9.2 V, so the protected device must tolerate this level, or a lower-clamp ESD array should be added downstream. Keep the TVS trace short to minimize parasitic inductance, which otherwise raises the effective clamp voltage during fast edges. This page adds value beyond the datasheet: distributor pricing tiers, five multi-source drop-in alternatives, an 8-parameter comparison table, and practical surge-protection design notes synthesized in one place.
SMBJ5.0A-13-F - 600W TVS Diode 5V | Diodes Inc
The Diodes Incorporated SMBJ5.0A-13-F is a 600 W unidirectional surface-mount transient voltage suppressor (TVS) diode with a 5 V reverse standoff voltage, 9.2 V maximum clamping voltage at 65.2 A peak pulse current, housed in the industry-standard SMB (DO-214AA) 2-pin package. A TVS diode is a type of overvoltage protection device that clamps fast voltage transients - such as ESD, EFT, lightning-induced surges, and inductive load-switching spikes - by avalanching within nanoseconds and diverting surge current away from the protected circuit. TVS diodes sit within the broader hierarchy of circuit protection devices alongside varistors and gas discharge tubes, offering the fastest response and tightest clamping of the three. Key features of the SMBJ5.0A-13-F include 600 W peak pulse power dissipation (10/1000 us waveform), a low 6.4 V minimum breakdown voltage for a 5 V standoff, a 7.23 V breakdown typical figure, and a low leakage current of 800 uA at standoff. The glass-passivated die construction ensures stable avalanche characteristics and long-term reliability across the -55C to +150C operating range. The unidirectional construction clamps positive transients to 9.2 V maximum and conducts negative transients as a forward-biased diode at approximately 0.7 V, making it ideal for protecting DC power rails, USB lines, RS-485 interfaces, and low-voltage sensor inputs. The -13-F suffix denotes Diodes Incorporated's lead-free, RoHS-compliant tape-and-reel packing variant of the standard SMBJ5.0A. Typical applications include 5 V DC power bus protection, automotive 12 V auxiliary rail clamping, consumer electronics power entry protection, and industrial I/O port surge suppression where DO-214AA footprints are already laid out. Design consideration: verify the clamping voltage headroom - the 9.2 V maximum clamp must remain below the absolute maximum rating of the downstream IC; at 5 V rails, most logic tolerates this, but check low-voltage LDO inputs carefully. This page synthesizes distributor pricing, verified drop-in alternatives from multiple manufacturers, and practical design notes not found in the manufacturer datasheet.
SMBJ5.0A-E3/52 - 600W 5V Unidirectional TVS Diode | Vishay
The Vishay General Semiconductor - Diodes Division SMBJ5.0A-E3/52 is a 600 W unidirectional surface-mount TransZorb transient voltage suppressor (TVS) diode with a 5.0 V reverse standoff voltage, a minimum breakdown voltage of 6.4 V, a maximum clamping voltage of 9.2 V at 65.2 A peak pulse current, housed in the JEDEC DO-214AA (SMB) package. A TVS diode is a silicon avalanche device engineered to clamp fast-rising voltage transients before they can destroy sensitive downstream electronics. Within the power-management hierarchy, TVS diodes form the first line of circuit protection, sitting upstream of varistors and ESD arrays for higher-energy events, and complementing fuses and PTC devices that address sustained overcurrent faults. Key features of the SMBJ5.0A-E3/52 include 600 W peak pulse power capability on a 10/1000 us waveform at a 0.01% duty cycle, very fast response time to transient overvoltage, low incremental surge resistance, a glass-passivated chip junction for long-term reliability, and a low-profile body that is ideal for automated pick-and-place assembly. The /52 grade features matte tin-plated, lead-free terminals in a UL94 V-0 flame-rated moulding compound. Technically, the device operates through avalanche breakdown: when a surge such as an inductive load switching spike or a lightning-induced transient exceeds the 6.4 V minimum breakdown threshold, the junction conducts within nanoseconds and diverts surge current to ground, clamping the node below the 9.2 V maximum. The 5% breakdown tolerance grade ('A' suffix) gives designers tighter predictable protection thresholds than the standard tolerance grade. Typical applications include protection of low-voltage DC supply rails (5 V logic and USB power), input protection on automotive and industrial sensor signal lines, shielding ICs and MOSFETs against switching-induced transients, and IEC 61000-4-2 style ESD robustness at board-level interfaces in consumer, computer, and telecommunication equipment. A key design consideration is derating: peak pulse power scales down as ambient temperature rises and as surge duration extends beyond the 10/1000 us reference waveform, so engineers should verify clamping against the full line waveform spectrum rather than only the datasheet point. This page synthesizes verified distributor pricing, drop-in alternatives from multiple manufacturers, and practical design notes not consolidated in the manufacturer datasheet alone.
SMBJ5.0A-F1-0000HF - 600W 5V TVS Diode SMB | Yangjie
The Yangjie (Yangzhou Yangjie Electronic Technology) SMBJ5.0A-F1-0000HF is a 600 W unidirectional transient voltage suppressor (TVS) diode with a 5 V reverse working voltage, 6.4 V minimum breakdown voltage, and 9.2 V maximum clamping voltage at 65.3 A peak pulse current, housed in the surface-mount DO-214AA (SMB) package. A TVS diode is a silicon avalanche protection device placed across sensitive circuit nodes to clamp fast high-energy transients such as ESD strikes, inductive load switching spikes, and lightning-induced surges. In the power-management hierarchy it sits in the overvoltage-protection layer, upstream of regulators, interfaces, and ICs that cannot tolerate transient excursions above their absolute maximum ratings. Key features of the SMBJ5.0A-F1-0000HF include a 600 W peak pulse power rating (10/1000 us waveform), low dynamic resistance that keeps clamping voltage close to 9.2 V at full surge current, fast response to transient events (effectively instantaneous avalanche action), and a glass-passivated junction for reliability. The -F1 suffix and HF marking denote the Yangjie reel-code variant with halogen-free construction. Technically, the device uses a planar, glass-passivated avalanche junction that transitions from standby leakage to full conduction within nanoseconds of the transient exceeding breakdown. Unidirectional polarity means it clamps positive surges by avalanche breakdown and negative surges by forward conduction at approximately 0.7 V, making it ideal for protecting DC power rails referenced to ground. Typical applications include 5 V DC rail protection in industrial PLCs, USB and low-voltage port surge suppression, automotive module secondary protection, and telecom equipment front ends where IEC 61000-4-2 style ESD events must be absorbed. Design consideration: because the standoff voltage is only 5 V, verify worst-case rail tolerance stays below 5 V, or leakage and clamping behavior will be compromised; for 5 V-tolerant rails with headroom issues, consider a higher-standoff SMBJ variant. This page adds value beyond the datasheet by synthesizing cross-brand drop-in alternatives, distributor pricing context, and practical PCB layout guidance in one place.