SMBJ15CA-TR - 600W 15V Bidirectional TVS Diode | STMicroelectronics
MPN: SMBJ15CA-TR ✓ فعالSMBJ15CA-TR جائزہ
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.
کے لیے ڈراپ اِن متبادل SMBJ15CA-TR — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں SMBJ15CA-TR (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Operating Temperature, RoHS Status, Series.
SMBJ15CA-TR
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →SM6T15CA
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
SMBJ15CA
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →SMBJ15CA
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →SMBJ15CA
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →SMBJ15CA
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →SMBJ15CA-E3/52T
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
SMBJ15CA-TR زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Series | SMBJ / TRANSIL |
| Type | Bidirectional TVS (Transil) |
| Peak Pulse Power (10/1000 us) | 600 W |
| Working Standoff Voltage (VWM) | 15 V |
| Breakdown Voltage (VBR) min | 16.7 V |
| Breakdown Voltage (VBR) max | 18.5 V |
| Clamping Voltage (VC) max at IPP | 24.4 V |
| Peak Pulse Current (IPP) | 25.1 A |
| پیکیج | DO-214AA (SMB) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| پنز کی تعداد | 2 |
| آپریٹنگ درجہ حرارت | -55C to +150C |
| ESD Protection (IEC 61000-4-2) | Compliant |
| EFT Protection (IEC 61000-4-4) | Compliant |
| RoHS اسٹیٹس | Compliant (ECOPACK) |
SMBJ15CA-TR پن کنفیگریشن
| پن 1 | Terminal 1 (cathode bar) — Bidirectional - electrically identical to pin 2 in operation |
| پن 2 | Terminal 2 (anode) — Bidirectional - electrically identical to pin 1 in operation |
عام استعمالات
SMBJ15CA-TR کے لیے موزوں ہے 6 ایپلیکیشنs: 12 V Industrial DC Rail Protection, RS-485 / CAN Bus Transient Suppression, USB VBUS and Data Line Protection, Automotive 12 V Accessory Rail Protection, Telecom Line Card Secondary Protection, Industrial Sensor I/O Protection.
12 V Industrial DC Rail Protection
The SMBJ15CA-TR is well suited for protecting 12 V industrial power rails from inductive kickback and surge transients. Placed directly across the DC output of a 12 V switching converter or PLC input terminal, its 15 V working standoff accommodates nominal 12 V plus allowable ripple, while the 24.4 V clamp at 25.1 A holds transients below the 30 V abs-max of common 24 V-tolerant downstream ICs. The 600 W peak pulse capability (10/1000 us) absorbs the energy from contactor or relay coil turn-off, which can otherwise inject hundreds of volts into low-voltage signal lines. The DO-214AA (SMB) package dissipates the pulsed energy through PCB copper pads, enabling compact, low-profile protection without a heatsink.
تجویز کردہ
RS-485 / CAN Bus Transient Suppression
For RS-485 and CAN bus interfaces exposed to outdoor or factory cabling, the SMBJ15CA-TR provides bidirectional overvoltage clamping on each data line. Its bidirectional construction eliminates orientation errors during PCB assembly, while the 24.4 V clamp voltage stays below the 26 V transceiver abs-max. The sub-nanosecond response time of the TRANSIL junction catches fast ESD and EFT events before they propagate into the transceiver, and the part's IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT) compliance supports the certification requirements of most industrial communication standards. Place one SMBJ15CA-TR per signal pair near the bus connector for best protection.
تجویز کردہ
USB VBUS and Data Line Protection
The SMBJ15CA-TR clamps USB VBUS and data-line transients to 24.4 V max, well below the 30 V abs-max of common USB controllers. At its 25.1 A peak pulse current, it absorbs hot-plug arcs and charger-fault overvoltages that would otherwise latch up or destroy downstream PMICs. The bidirectional rating is ideal for differential data lines (D+/D-), where it suppresses both positive and negative ESD events symmetrically. Using one SMBJ15CA-TR on VBUS and one on the data pair provides a complete IEC 61000-4-2 compliant protection scheme in the compact DO-214AA footprint, fitting easily behind a USB Type-C connector.
تجویز کردہ
Automotive 12 V Accessory Rail Protection
Inside automotive infotainment and body-electronics modules, the SMBJ15CA-TR protects 12 V accessory rails from load-dump and jump-start transients up to its 600 W / 10/1000 us rating. Bidirectional polarity works for both positive and negative-going spike events. While the part is not specifically AEC-Q100 qualified, it is widely used in non-safety automotive subsystems where 12 V nominal operation must be hardened against alternator transients and reverse-battery faults (when paired with a series Schottky). Its SMB package and tape-and-reel packaging suit high-volume automotive ECU assembly lines.
تجویز کردہ
Telecom Line Card Secondary Protection
In telecom line-interface cards, the SMBJ15CA-TR acts as a secondary protection TVS behind the primary gas-discharge tube (GDT) and PTC thermistor. Its fast turn-on characteristic closes the protection gap that slower primary protectors leave open during the first few microseconds of a surge event. The 24.4 V clamping voltage is safe for -48 V feed interfaces operating through a current-limited bridge, and the 25.1 A peak pulse current matches typical surge test waveforms used in GR-1089 core specifications. The SMB package size allows multi-channel protection density on the line-interface PCB.
تجویز کردہ
Industrial Sensor I/O Protection
The SMBJ15CA-TR shields analog and digital sensor I/O lines from the ESD and surge events that occur when long cable runs are exposed to motor switching, lightning-induced ground potential rise, or operator contact. Mounted within 5 mm of the sensor connector, its 24.4 V clamp holds the line within the 26 V abs-max of typical 4-20 mA loop transmitters and 0-10 V analog front ends. The bidirectional TRANSIL structure is especially valuable for differential sensor pairs (RTD, thermocouple, strain gauge bridges) where polarity can be ambiguous. Combined with a small series resistor for current limiting, it forms a robust IEC 61000-4-2/4-4 compliant input protection network.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا SMBJ15CA-TR — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | SMBJ15CA (Littelfuse) | SMBJ15CA (Microchip) | SMBJ15CA (SMC) | SMBJ15CA-E3/52T (Vishay) |
|---|---|---|---|---|---|
| Package | DO-214AA (SMB) | DO-214AA (SMB) - same | DO-214AA (SMB) - same | DO-214AA (SMB) - same | DO-214AA (SMB) - same |
| Brand | STMicroelectronics | Littelfuse | Microchip Technology | SMC Diode Solutions | Vishay Intertechnology |
| Working Standoff Voltage (VWM) | 15 V | 15 V | 15 V | 15 V | 15 V |
| Clamping Voltage (VC) max | 24.4 V | 24.4 V | 24.4 V | 24.4 V | 24.4 V |
| Peak Pulse Power (10/1000 us) | 600 W | 600 W | 600 W | 600 W | 600 W |
| Polarity | Bidirectional | Bidirectional | Bidirectional | Bidirectional | Bidirectional |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
اہم امتیازی خصوصیات
- Highest cross-brand availability with identical ratings (بمقابلہSMBJ15CA (Littelfuse, Microchip, SMC, Vishay))
- Slightly higher peak pulse current (بمقابلہSMBJ15CA (Littelfuse 24.6 A))
- Wide distributor stock at active lifecycle (بمقابلہSMBJ15CA-E3/52T (Vishay))
ڈیزائن نوٹس
Mount the SMBJ15CA-TR within 5 mm of the protected connector or IC pin. The DO-214AA leads have approximately 1 nH of parasitic inductance per millimeter of trace, and at 25 A peak current this translates to several volts of additional overshoot during the first nanoseconds of a transient. Keep both pads connected to wide copper pours (minimum 100 mm^2 per pad) to absorb the 600 W pulsed energy without overheating. Estimated: trace inductance at 5 mm is ~5 nH, contributing ~25 V/L di/dt overshoot during a 1 ns edge.
The SMBJ15CA-TR's 600 W peak pulse rating only applies to short transients (10/1000 us). For sustained overvoltage conditions, the steady-state power dissipation is limited by the thermal resistance from junction to ambient (approximately 30-40 C/W on a standard FR-4 PCB). Use the derating curve in the ST datasheet to determine continuous power handling; in practice, keep DC dissipation below 1 W per part unless substantial copper cooling is added.
Do not place the SMBJ15CA-TR in series with the protected line - it must always be in parallel (shunt across the line). A common engineering error is to use a bidirectional TVS on a DC rail that sees sustained overvoltage, which can overheat the die; ensure the working voltage stays at or below 15 V DC under all operating conditions including battery charging transients and fault scenarios.
For high-speed data lines such as USB 3.0 or HDMI, the SMBJ15CA-TR's junction capacitance (typically several hundred pF for a 600 W TVS of this voltage) can degrade signal integrity above 100 MHz. For such applications, consider a lower-capacitance dedicated ESD array; the SMBJ15CA-TR is best reserved for DC power and slower industrial interfaces like RS-485 and CAN where its capacitance is acceptable.
تعمیل کی معلومات
ST ECOPACK2 compliant per ST product page. Standard SMBJ series is not AEC-Q100 qualified - check ST's automotive-grade SMA/SMB variants if automotive qualification is required.
