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AFT26P100-4WSR3 - 22W 2.6GHz Doherty RF LDMOS | NXP
The NXP AFT26P100-4WSR3 is a 22-watt symmetrical Doherty RF power LDMOS transistor designed for cellular base station applications requiring very wide instantaneous bandwidth capability over the 2496 to 2690 MHz frequency range. The device operates from a 28 V drain supply, delivers 15.1 dB power gain at 200 mA quiescent bias, and is housed in an NI-780S-4 (NI780S-6) ceramic air-cavity package optimized for high-power RF performance. An RF power LDMOS (Laterally Diffused Metal-Oxide Semiconductor) transistor is a specialized power MOSFET designed to deliver high RF output power with excellent gain and efficiency in the VHF/UHF/microwave bands. LDMOS technology is the dominant solution for cellular base station power amplifiers because it combines high breakdown voltage, good linearity, and a favorable cost-per-watt ratio. Within the RF power transistor hierarchy, the AFT26P100-4WSR3 belongs to NXP's Airfast family, which sits at the high-power end of the cellular infrastructure market and is targeted at macro-cell Doherty amplifier final stages. Key features include 22 W average output power under Doherty operation, 15.1 dB typical power gain, dual-channel symmetrical device geometry that simplifies Doherty combiner design, and a 65 V maximum drain-source voltage rating for robust operation into high VSWR loads. The NI-780S-4 ceramic package provides low thermal resistance and is designed for direct bolt-down mounting on a heatsink or thermal spreader. The symmetrical two-section transistor layout enables easy implementation of a two-way Doherty amplifier with main and peak paths on a single die pair. Architecturally, the device is an N-channel enhancement-mode lateral MOSFET fabricated on NXP's high-volume LDMOS process, with internal input and output pre-matching to reduce external matching component count. The high gain and wide instantaneous bandwidth make it particularly suitable for multi-carrier GSM, WCDMA, and LTE base station applications operating in the 2.6 GHz band (Band 38, Band 41, and similar TDD allocations). Typical applications include 4G LTE and 5G NR massive-MIMO base station final-stage Doherty amplifiers, multi-carrier GSM/EDGE power amplifiers, and Doherty driver stages in macro-cell base station radios covering the 2496-2690 MHz range. It is also used as a building block in small-cell and remote-radio-head (RRH) transmit chains that require high power density in a compact footprint. Designers should pay particular attention to PCB thermal management: the NI-780S-4 package requires a robust thermal interface (thermal compound or solder preform) and a low-thermal-resistance heatsink to keep the junction below 200 C at full 22 W average output. Proper bias sequencing and a regulated gate supply are required to avoid thermal runaway during Doherty operation. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
AFV09P350-04GNR3 - 100W 920MHz LDMOS RF Power Transistor | NXP
The NXP Semiconductors AFV09P350-04GNR3 is a 100 W symmetric Doherty RF power LDMOS transistor designed for cellular base station power amplifiers covering the 720 to 960 MHz frequency range. Housed in the OM-780G-4L surface-mount ceramic package, it operates from a 48 V drain supply, delivers 19.5 dB of power gain at 920 MHz, and is rated for 100 W average output power in Doherty amplifier configurations used in modern 4G LTE and 5G NR radio access networks. An RF power LDMOS transistor is a laterally diffused metal-oxide-semiconductor power device optimized for high-frequency, high-output RF amplification. The LDMOS architecture combines a short channel length with a lightly doped drain drift region, enabling high breakdown voltage, high gain, and excellent thermal stability. Within the power management hierarchy, RF LDMOS transistors sit alongside GaN HEMTs as the workhorse devices for macro-cell base-station PAs; they are tuned for high linearity, gain, and ruggedness under mismatch, making them the dominant technology below 3 GHz. Key features include a 48 V supply rail typical of macro-cell base stations, 19.5 dB typical gain at 920 MHz that simplifies driver-stage design, 100 W average output power in Doherty service, and a symmetric Doherty pair topology that eliminates the input splitter/output combiner imbalance of conventional asymmetric Doherty designs. The OM-780G-4L ceramic package provides low parasitic inductance, an integrated heat spreader, and an epoxy-sealed flange for direct PCB or heatsink mounting. The AFV09P350-04GNR3 is built on NXP's AirFast-generation LDMOS process technology, featuring a high-resistivity silicon substrate and a gold-plated metal system that minimizes conduction losses. Symmetric Doherty operation allows main and peaking devices to be biased without an offset, simplifying gate-bias networks and improving back-off efficiency versus legacy asymmetric Doherty designs. The device is rated for continuous-wave (CW) operation as well as pulsed waveforms common in TDD-LTE and 5G NR applications. Typical applications include 4G LTE and 5G NR macro-cell base-station PAs operating in the cellular 900 MHz band (Band 8), distributed antenna systems, small-cell and integrated radio units, and general-purpose high-power UHF transmitters in the 720-960 MHz range. When designing with this device, the OM-780G-4L package requires careful thermal management - solder to a copper-clad PCB land pattern with adequate copper pour or attach the ceramic flange to an external heatsink. Input and output matching networks must be optimized for the target sub-band, and proper sequencing of gate bias must be observed to avoid in-rush currents on the 48 V rail. This page synthesizes distributor pricing, NXP cross-reference alternatives, and practical thermal design guidance not found in the manufacturer datasheet alone.
AIKB40N65DH5ATMA1 - 650V 40A TRENCHSTOP 5 IGBT | Infineon
The Infineon AIKB40N65DH5ATMA1 is a 650 V, 40 A high-speed NPT IGBT built on Infineon's TRENCHSTOP 5 technology and co-packaged with a RAPID 1 fast and soft antiparallel diode, delivered in a surface-mount PG-TO263-3-2 (D2PAK) package. According to the Infineon product page, the part is qualified for automotive discrete switch applications and targets fast-switching topologies where energy efficiency and switching loss minimization are critical. An IGBT (Insulated Gate Bipolar Transistor) is a power semiconductor that combines the high-input-impedance voltage control of a MOSFET with the high-current-density, low-saturation-voltage conduction of a bipolar junction transistor. Within the broader taxonomy, an IGBT belongs to the discrete semiconductor family, sits under the power-transistor hierarchy, and is the workhorse device for medium-to-high voltage (typically 600 V to 6500 V) switching converters, motor drives, and inductive heating systems. The TRENCHSTOP 5 generation specifically targets reduced VCE(sat) and switching losses relative to the prior TRENCHSTOP 4 platform. Key specifications include a VCES rating of 650 V, a nominal collector current of 40 A, and an integrated RAPID 1 fast/soft co-pack diode that suppresses reverse-recovery-induced voltage overshoot. The device is qualified to AEC-Q101 for automotive use, supporting deployment in EV traction inverters, on-board chargers, and DC/DC converters. The D2PAK (PG-TO263-3-2) surface-mount package enables automated assembly and provides a low thermal-resistance path via its exposed die-attach pad. The AIKB40N65DH5ATMA1 uses a non-punch-through (NPT) trench cell design with a sophisticated carrier profile, achieving a low VCE(sat) while maintaining a wide safe operating area. The co-packed RAPID 1 diode is optimized for soft reverse recovery, reducing EMI in hard-switched bridge topologies. Together, the matched IGBT/diode pair minimizes turn-on losses in the complementary switch by reducing peak reverse-recovery current. Typical applications include EV charging infrastructure (on-board chargers and DC fast-charging stations), photovoltaic string inverters, uninterruptible power supplies (UPS), industrial motor drives, and induction cooking. The automotive-grade qualification makes the device particularly suitable for 400 V and 800 V electric-vehicle powertrain converters. When designing with this device, pay close attention to gate-drive voltage (recommended +15 V on, 0 V or negative off) and gate resistance selection. A gate resistor of 5 ohm to 47 ohm typically balances switching loss against EMI. The D2PAK footprint requires substantial PCB copper area (typically 1 to 6 square inches of 2 oz copper) to keep junction temperature within safe limits. This page synthesizes distributor pricing, drop-in cross-brand alternatives, and practical design notes not found on a single manufacturer or distributor page.
AIKB50N65DF5ATMA1 - 650V 50A TRENCHSTOP 5 IGBT | Infineon
The Infineon AIKB50N65DF5ATMA1 is a 650 V, 50 A automotive-grade NPT IGBT featuring TRENCHSTOP 5 technology, co-packaged with a RAPID-1 fast-recovery anti-parallel diode, in a surface-mount PG-TO263-3-2 (D2PAK) package. It is engineered for high-efficiency hard-switching and resonant topologies with best-in-class switching losses and conduction characteristics. An IGBT (Insulated-Gate Bipolar Transistor) is a power semiconductor that combines the high-input impedance of a MOSFET with the low-saturation-voltage drop of a bipolar transistor, enabling efficient switching at high voltages and currents. It sits in the power-semiconductor hierarchy alongside MOSFETs and sits downstream of gate drivers and upstream of the inductive load it commutates. IGBTs are the workhorse of mid-voltage (400 V to 1700 V), high-current (10 A to 3600 A) power conversion. Key features of the AIKB50N65DF5ATMA1 include 650 V collector-emitter breakdown voltage, 50 A nominal collector current, very low VCE(sat) for reduced conduction loss, and a co-packaged RAPID-1 soft fast-recovery diode optimized for low EMI and high dv/dt immunity. The TRENCHSTOP 5 thin-wafer technology shrinks switching losses by roughly 20 percent versus previous TRENCHSTOP generations, and the part is qualified to AEC-Q101 for automotive use. The thin-wafer TRENCHSTOP 5 cell architecture replaces the older NPT field-stop concept with a smaller die that reduces both Eon and Eoff per switching cycle. The integrated RAPID-1 diode is matched to the IGBT's switching speed, suppressing reverse-recovery spikes and lowering electromagnetic emissions in hard-switched bridges such as totem-pole PFC. Typical applications include on-board chargers for electric vehicles, automotive and industrial PFC stages, totem-pole PFC and bridgeless boost converters, DC/AC inverters for motor drives, photovoltaic string and micro-inverters, and uninterruptible power supplies. The 650 V class rating suits 400 V DC-link designs common in EV powertrains and three-phase industrial drives. When designing with this part, observe the datasheet's maximum case temperature, keep the gate-drive loop inductance below the recommended limit (typically below 20 nH) and choose a turn-off gate resistor that balances Eoff against dv/dt-induced ringing. The D2PAK footprint requires sufficient PCB copper area for thermal dissipation at full load. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and application-focused design notes not found in the standalone Infineon datasheet.
AIMBG120R010M1XTMA1 - 1200V 205A 8.7mΩ SiC MOSFET | Infineon
The Infineon AIMBG120R010M1XTMA1 is a CoolSiC™ G1 automotive-grade 1200 V silicon-carbide (SiC) trench MOSFET in a PG-TO263-7 surface-mount package. It is rated for 205 A continuous drain current (at Tc) and 882 W power dissipation, with a best-in-class typical on-resistance of 8.7 mΩ. The trench SiC technology enables best-in-class switching energy, reduced reverse-recovery charge, and higher switching frequencies than equivalent silicon IGBTs or super-junction MOSFETs. The part is qualified to AEC-Q101 for automotive traction inverter and on-board charger (OBC) applications. A silicon-carbide MOSFET is a wide-bandgap (WBG) power switch that uses SiC as the semiconductor substrate instead of silicon. Compared to silicon MOSFETs and IGBTs, SiC MOSFETs offer higher breakdown field, lower on-resistance per unit area, higher operating temperature (up to 200°C junction), and dramatically lower switching losses. Within the discrete-power hierarchy, a SiC MOSFET sits between standard MOSFETs and IGBTs: like a MOSFET it is voltage-controlled with a gate, but like an IGBT it can block 1200 V or more efficiently, making it the device of choice for high-voltage high-frequency power conversion. Key features of the AIMBG120R010M1 include a 1200 V drain-source breakdown voltage, a continuous drain current of 205 A (Tc), a pulsed current capability (per datasheet) above 400 A, and a maximum junction temperature of 175°C (some CoolSiC G1 datasheets extend to 200°C). The body diode is robust with low reverse recovery (Qrr typically well under 100 nC), supporting hard-switched bridge topologies. The PG-TO263-7 package has an exposed tab that must be soldered to the PCB copper pour to achieve the rated power dissipation. Typical applications include EV traction inverters (400 V and 800 V architectures), on-board chargers (OBC), DC-DC converters for EV powertrains, solar string inverters, industrial servo drives, and aerospace power conversion. The AEC-Q101 automotive qualification makes it directly suitable for xEV platforms. When designing with this device, the gate drive must deliver +15 V to +18 V for full enhancement with low RDS(on), and a negative turn-off voltage of -3 V to -5 V is recommended to prevent parasitic turn-on in half-bridge configurations. Always verify creepage and clearance for 1200 V operation per IEC 60664, and provide adequate thermal management to keep Tj below 150°C in automotive continuous duty. This page synthesizes distributor pricing (DigiKey, Mouser, LCSC, Arrow), AEC-Q101 qualified drop-in alternatives in the same PG-TO263-7 footprint, and practical gate-drive and thermal design notes not consolidated in the manufacturer datasheet.
AIMW120R035M1H - 1200V 35mΩ SiC MOSFET | Infineon | Automotive
The Infineon AIMW120R035M1H is a CoolSiC automotive-grade 1200V silicon carbide (SiC) trench MOSFET with an on-state resistance of 35 mOhm at Tj = 25C and a maximum continuous drain current of 52 A at 25C, housed in a TO-247 through-hole power package. It belongs to Infineon's first-generation (G1) 1200V CoolSiC trench platform targeted at automotive traction and industrial power conversion. A silicon carbide MOSFET is a unipolar power semiconductor switch that uses a wide-bandgap SiC semiconductor layer instead of conventional silicon. Because SiC offers roughly ten times higher critical electric field strength, the drift region can be made much thinner and more heavily doped, yielding lower specific on-resistance, lower switching losses, and far higher junction temperature capability than comparable silicon superjunction or IGBT devices. Within the power semiconductor hierarchy, the AIMW120R035M1H sits under power MOSFETs, discrete semiconductors, and power conversion components. Key differentiating specifications include the 1200 V maximum drain-source voltage, the 35 mOhm typical on-state resistance at 25C, and the 52 A continuous drain current rating at 25C. The trench-gate CoolSiC cell design provides a highly reliable gate oxide and supports the negative gate-source voltage turn-off margins demanded by automotive designs, while the wide bandgap material enables low gate charge and fast, clean switching transitions. Technically, the CoolSiC trench architecture couples a deep trench gate with an optimized cell pitch to reduce channel resistance, which is the dominant resistance term in medium-voltage SiC MOSFETs. Infineon explicitly recommends operating conditions that do not exceed 80% of the datasheet maximum ratings for optimum lifetime and reliability, a derating guideline documented in the datasheet maximum-ratings section. Typical applications include onboard chargers (OBC) and DC-DC converters in electric vehicles, traction inverters auxiliary supplies, solar string inverters, and industrial motor drives operating from 800V-class DC buses. The 1200 V blocking capability with 35 mOhm on-resistance makes the device a strong fit for half-bridge and boost topologies switching at 50-150 kHz. A key design consideration is gate-drive engineering: fast SiC switching produces high dv/dt, so designers should minimize common-source inductance, use negative gate drive for reliable turn-off, and verify thermal design against the 80% derating recommendation for maximum ratings. This page synthesizes verified datasheet parameters, drop-in alternatives, pricing tiers, and practical design guidance not found in the manufacturer datasheet alone. Pricing data referenced on this page is as of 2026-09-11.
AON6414A - 30V N-Channel MOSFET, 50A, 8mΩ | Alpha & Omega
The Alpha & Omega Semiconductors AON6414A is a 30 V N-Channel MOSFET rated for 50 A continuous drain current, built on advanced trench MOSFET technology and offered in a surface-mount 8-DFN (5x6) package. Per the manufacturer datasheet it achieves an extremely low R<sub>DS(on)</sub> of 8 mΩ at V<sub>GS</sub> = 10 V and is intended as a high-side switch in SMPS and general-purpose load-switch applications. The part dissipates 2.3 W on the PCB (Ta) and 31 W with case mounting (Tc), making thermal management a key design consideration. An N-Channel MOSFET such as the AON6414A is a voltage-controlled, majority-carrier device in which a positive gate-to-source voltage creates an inversion layer (channel) beneath the gate oxide, permitting electron flow between source and drain. In the broader taxonomy the part is a power MOSFET, a sub-family of discrete transistors and the workhorse switching element inside switch-mode power supplies (SMPS), DC-DC converters, and battery-management systems. AOS targets this 30 V/50 A class at point-of-load (POL) regulators, USB-PD rails, and high-current load switching where ultra-low R<sub>DS(on)</sub> directly translates to lower conduction loss and higher efficiency. Key features include trench technology generation N-channel construction, very low on-resistance (8 mΩ max at V<sub>GS</sub>=10 V), low gate charge, and a small 5×6 mm DFN footprint with an exposed pad for low thermal resistance. The 50 A continuous drain rating (T<sub>C</sub>) is well above the typical 13 A figure on a FR-4 board without heatsinking, so designers must verify junction temperature with their real PCB layout. Application coverage spans high-side switching in SMPS, DC-DC converter synchronous-rectifier and control-side FETs, battery-powered load management, and general purpose switching. When using the AON6414A as a high-side switch, place a 10 kΩ pull-down on the gate to prevent inadvertent turn-on during power-up, and observe the SOA curves for pulsed load conditions.
AQ15-02HTG - 15V 500W 2-Channel TVS Diode Array | Littelfuse
The Littelfuse AQ15-02HTG is a 2-channel, 500 W transient voltage suppressor (TVS) diode array designed to protect sensitive electronics from electrostatic discharge (ESD), electrical fast transients (EFT), and lightning-induced surges. Housed in a compact SOT-23-3 surface-mount package, it provides a working voltage of 15 V, a clamping voltage of 30 V at 15 A (8/20 µs), and a peak pulse power rating of 500 W (8/20 µs). A TVS diode array is a class of discrete semiconductor protection device that uses avalanche-breakdown junctions to clamp transient overvoltages to safe levels in microseconds. TVS arrays sit in the protection-component hierarchy between simple Zener clamps and multi-stage gas-discharge or polymer suppressors, and they belong to the broader category of circuit-protection semiconductors. By integrating two steering diodes and a central TVS die in a single 3-pin package, the AQxx-02HTG series provides differential or single-ended protection on data lines and power rails without requiring multiple discrete components. Key features include ±30 kV ESD protection per IEC 61000-4-2 (contact and air discharge), ultra-low capacitance of 85 pF suitable for high-speed interfaces, low clamping voltage of 30 V at 15 A peak pulse current, and a low leakage current of 1 µA at the working voltage. The SOT-23-3 package is footprint-compatible with industry-standard 3-pin SOT-23 outlines, enabling drop-in placement on existing PCB layouts. The AQ15-02HTG uses an avalanche-junction TVS structure combined with low-capacitance steering diodes, achieving sub-nanosecond turn-on time. This architecture absorbs repetitive strikes without performance degradation, making it ideal for industrial and automotive environments exposed to frequent ESD events. The 85 pF line capacitance is acceptable for CAN, RS-485, and general-purpose I/O protection but should be evaluated for USB 2.0 high-speed data lines where lower capacitance is preferred. Typical applications include industrial CAN bus protection, RS-485 transceiver protection, automotive ECU I/O protection, sensor interface protection, factory automation I/O, and consumer electronics ESD protection on USB and HDMI ports. The AQxx-02HTG series is AEC-Q101 qualified for automotive use. When designing with this device, place the AQ15-02HTG as close as possible to the connector or ESD entry point, keep the trace between the protected IC and the TVS short, and provide a low-impedance ground return to the chassis or earth ground. Avoid routing protected traces beneath the device to minimize parasitic coupling. This page synthesizes distributor pricing, drop-in alternatives, and practical layout guidance not aggregated in the manufacturer datasheet, giving engineers a single reference for component selection, BOM risk mitigation, and PCB design.
ATP114-TL-H - 60V 55A P-Channel MOSFET ATPAK | onsemi
The onsemi ATP114-TL-H is a P-Channel Power MOSFET rated at -60V VDS and -55A continuous drain current (Ta), with a 60W power dissipation rating at Tc, housed in an ATPAK surface-mount package. It features a typical on-resistance of 16 mOhm at VGS = -10V and is designed for general-purpose switching applications including load switching, DC-DC converters, motor control, and power management circuits where a P-channel high-side switch is preferred over an N-channel solution to simplify gate drive design. A P-Channel Power MOSFET is a type of field-effect transistor (FET) in which the channel is formed by p-type semiconductor material, and the device is turned on by applying a negative gate-to-source voltage. P-channel MOSFETs sit in the same hierarchy as N-channel MOSFETs under the parent family of power MOSFETs, which themselves belong to the broader category of discrete semiconductors used for power switching. Because the drain is at the lower potential and the source is at the higher potential (opposite of N-channel), a P-channel device enables low-side gate drive referenced to ground — eliminating the need for a bootstrap or charge pump circuit in high-side switching topologies. The ATP114-TL-H delivers a typical R_DS(on) of 16 mOhm at VGS = -10V, providing low conduction loss and high efficiency when used as a high-side switch in 12V automotive and industrial systems. Its ATPAK package offers a robust mechanical form factor with a drain-tab connection on top, suitable for surface-mount manufacturing. The device is qualified for switching applications with a focus on minimizing switching losses through fast rise and fall times. Internally, the ATP114 uses a vertical DMOS structure with a p-channel inversion layer, leveraging onsemi's standard silicon MOSFET process technology. The device exhibits low gate charge for fast switching transitions and low on-resistance for minimal conduction loss, making it suitable for high-frequency PWM applications such as synchronous rectification in buck topologies. Typical applications include automotive load switching (lamps, solenoids, motors), DC-DC converter high-side switches, battery protection circuits, power OR-ing, and general-purpose industrial switching. The P-channel topology simplifies the gate drive circuit when switching a positive rail because the gate is referenced to the source (system positive rail). When designing with the ATP114-TL-H, ensure adequate copper-area heat dissipation because the ATPAK package relies primarily on the PCB drain tab for thermal relief. For high-current applications, use wide PCB traces or multiple vias to the drain pad. Note that since this is a MOSFET, the part should not be used in the vicinity of highly charged objects, per the manufacturer datasheet warning. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single decision-ready reference for the ATP114-TL-H.
AUIRF7640S2TR - 60V 21A DirectFET MOSFET for Class D | Infineon
The Infineon AUIRF7640S2TR is an automotive-grade N-channel HEXFET power MOSFET rated at 60 V VDS, with continuous drain current of 5.8 A at 25 °C ambient (TA) and 21 A at 25 °C case (TC), housed in the surface-mount DirectFET SB package. Per the Infineon datasheet, the part combines the latest Automotive HEXFET silicon technology with the DirectFET platform, optimized specifically for automotive Class D audio amplifier output stages. Maximum power dissipation is 2.4 W on TA and 30 W on TC, and the on-resistance is 36 mΩ typical. A DirectFET MOSFET is a chip-scale surface-mount power package in which the silicon die is mounted on a metallic can that forms both the drain contact and a low-resistance thermal path to the PCB. Unlike a standard SO-8 or DPAK, DirectFET places the source and gate on the top side and the drain on the bottom, providing an extremely low package resistance and superior thermal performance for the same footprint. The DirectFET SB case variant is widely used in audio amplifier output stages where both low RDS(on) and clean thermal management are required. Key features include a logic-level compatible gate drive, low total gate charge (Qg = 7.3 nC typical) that minimizes driver losses, and an automotive-grade qualification flow targeting AEC-Q101 reliability. The part is rated for avalanche operation and is intended for high-frequency PWM switching in the 250 kHz to 500 kHz range typical of Class D amplifiers. The DirectFET SB land pattern is electrically and thermally compatible with industry-standard layouts, simplifying PCB design and enabling vapor-phase, infrared, or conventional reflow soldering. Typical applications include automotive Class D audio amplifiers (4 Ω and 8 Ω loads), high-current DC-DC synchronous rectifiers, motor drive half-bridges, and OR-ing FETs in redundant power systems. The combination of 60 V rating and 21 A continuous drain current makes it suitable for 12 V and 24 V automotive bus rails where load-dump transients must be tolerated. When designing with this part, ensure that the PCB copper area under the DirectFET can is sized to keep junction temperature below 150 °C at worst-case load. The gate drive should swing at least 10 V for full RDS(on) optimization, although the part will turn on at 4.5 V. Always consult the manufacturer datasheet for SOA curves and thermal derating under pulsed audio loads.
AUIRF7769L2TR - 100V 3.5mΩ 375A Automotive DirectFET MOSFET | Infineon
The Infineon AUIRF7769L2TR is an automotive-grade N-channel HEXFET power MOSFET rated at 100V with an ultra-low R<sub>DS(on)</sub> of 3.5 mΩ at V<sub>GS</sub>=10V and a continuous drain current rating of 375A (T<sub>C</sub>) in a surface-mount DirectFET Isometric L8 package. It combines Infineon's latest Automotive HEXFET Power MOSFET silicon technology with the advanced DirectFET packaging platform, achieving the lowest on-state resistance in a footprint compatible with DPAK (TO-252AA) layouts while delivering only a 0.7 mm profile above the PCB. A power MOSFET is a voltage-controlled semiconductor switch that uses an insulated gate to modulate current flow between source and drain terminals, enabling high-efficiency power conversion. Within the broader taxonomy, a MOSFET belongs to discrete semiconductors -> transistors -> field-effect transistors -> power MOSFETs, where it serves as the primary switching element in DC-DC converters, motor drives, and load switches. The automotive-grade qualification of the AUIRF7769L2 places it under the AEC-Q100 reliability framework required for under-hood electronics. Key features include an advanced process technology targeting low R<sub>DS(on)</sub>, an industry-leading 100V breakdown voltage for 12V/24V/48V automotive bus systems, a 375A T<sub>C</sub>-rated continuous drain current, and 125W T<sub>C</sub> power dissipation. The DirectFET L8 package provides dual-side cooling capability through its top-side exposed metal pad while maintaining a DPAK-compatible land pattern. The AUIRF7769L2 architecture uses a trench-gate HEXFET cell structure to minimize conduction losses. DirectFET packaging removes the plastic overmold and replaces bond wires with a copper-clip-style leadframe, simultaneously reducing package resistance, parasitic inductance, and thermal resistance from junction to PCB. Typical applications include automotive 48V mild-hybrid DC-DC converters, heavy-load motor drives (EPS, braking, fan), high-current OR-ing for redundant power systems, and battery-disconnect switches in electric vehicles. The part is also widely deployed in industrial high-current synchronous rectification and hot-swap circuits. When designing with this MOSFET, account for high di/dt switching transients that demand a tight gate-drive loop and minimal source-inductance layout. The DirectFET metal pad should be soldered directly to the PCB copper pour for both electrical and thermal conduction - thermal vias under the package are recommended. This page synthesizes distributor pricing, AEC-Q100 compliance context, and drop-in alternative analysis not found in the manufacturer datasheet alone, providing a consolidated reference for automotive power design teams.
AUIRFB8409 - 40V 195A 0.97mΩ Auto MOSFET TO-220 | Infineon
The Infineon AUIRFB8409 is an automotive-grade N-channel HEXFET power MOSFET rated 40V VDS, 195A continuous drain current (Tc), and 375W power dissipation (Tc), housed in a TO-220AB through-hole package. Per Infineon's automotive MOSFET product page, the device features a maximum on-resistance of 1.2 mΩ and is rated for a maximum junction temperature of 175°C, making it suitable for motor drive and high-current switching applications. Distributor data from Mouser and DigiKey confirms the part is an automotive-grade single N-channel MOSFET with 0.97 mΩ R<sub>DS(on)</sub> at VGS=10V. An automotive-grade power MOSFET is a discrete semiconductor switch designed and qualified to AEC-Q101 stress-test criteria, providing higher reliability under temperature cycling, humidity, and vibration than commercial-grade equivalents. In the broader taxonomy, the AUIRFB8409 sits inside the power MOSFET family, which itself belongs to discrete semiconductors and ultimately to power management conversion. HEXFET refers to Infineon's (formerly International Rectifier) proprietary planar-trench cell architecture that achieves very low figure-of-mic on-resistance per unit silicon area, enabling the AUIRFB8409's 195A rating in a standard TO-220 outline. Key features of the AUIRFB8409 include 40V drain-source breakdown, 195A continuous drain current at case temperature 25°C, an ultra-low maximum on-resistance of 1.2 mΩ, 375W maximum power dissipation, and 175°C maximum operating junction temperature. The through-hole TO-220AB package provides mechanical robustness and direct heatsink mounting, while the automotive-grade qualification enables deployment in 12V and 24V vehicle electrical systems without additional up-screening. The AUIRFB8409 is optimized for high-current, low-frequency switching in which conduction loss dominates. The 0.97-1.2 mΩ on-resistance minimizes I²R losses at the 100-200A load levels typical of starter, alternator, and motor-drive circuits, while the 40V rating provides generous headroom above 12V/24V automotive bus transients. Compared with similarly rated TrenchFET or standard MOSFETs in TO-220, the HEXFET cell offers a favorable R<sub>DS(on)</sub>×Q<sub>g</sub> figure of merit for hard-switched topologies. Typical applications include automotive brushed DC motor drives (window lift, seat adjust, wiper, fan), 12V/24V high-current solenoid switching, electric power steering (EPS) controllers, and battery-disconnect / reverse-polarity protection switches. The Infineon product page specifically lists motor drives as a primary use case. The device's high current rating also suits industrial solenoid drivers and high-current load switches in 24V industrial buses. When designing with the AUIRFB8409, ensure the gate drive voltage is at least 10V to fully enhance the channel and achieve the rated R<sub>DS(on)</sub>. The TO-220AB package typically requires a thermal compound and clip-mounted or screw-mounted heatsink; at 195A conduction losses of P = I²R = (195)² × 0.001 ≈ 38W occur at full load, demanding substantial thermal management. Source-pin kelvin connection is recommended where very high di/dt switching occurs. This page synthesizes drop-in alternatives, distributor pricing as of 2026-10-07, automotive-grade application notes, and practical thermal guidance that goes beyond what is found in the standalone Infineon datasheet.
B240A-13-F - 40V 2A Schottky Rectifier, SMA | Diodes Incorporated
The Diodes Incorporated B240A-13-F is a 40 V, 2 A surface-mount Schottky barrier rectifier in the SMA (DO-214AC) package with a guard-ring die construction for transient protection. Its low forward voltage drop and high surge capability make it a workhorse diode for low-voltage, high-frequency rectifier stages. A Schottky barrier rectifier is a unipolar diode formed by a metal-semiconductor junction rather than a P-N junction, which eliminates the minority-carrier recombination delay and produces a forward voltage drop roughly half that of a silicon rectifier. Within the broader component taxonomy, it sits under discrete semiconductor > diode > rectifier > Schottky rectifier > surface-mount Schottky. This technology is most useful in switching power supplies, where the absence of reverse-recovery charge minimizes switching loss and EMI. Key specifications of the B240A-13-F include a 40 V repetitive peak reverse voltage (VRRM), 2 A average rectified forward current (IF(AV)), a low forward voltage typically around 0.45 V at 2 A, and a peak forward surge current of 50 A (8.3 ms single half-sine-wave). It is rated for operation from -65C to +150C (TJ) and is supplied on tape-and-reel in 5,000-piece reels, making it suitable for automated assembly lines. The device is lead-free, RoHS compliant, and reaches MSL Level 1 per JEDEC J-STD-020. The guard-ring die construction around the active junction suppresses avalanche breakdown at the edge of the Schottky barrier, improving transient robustness. Combined with the inherently low stored charge of the Schottky technology, the B240A-13-F delivers fast switching transitions, which reduces dead-time losses in synchronous-rectified buck converters and improves the efficiency of freewheeling paths in motor drive circuits. Typical applications for the B240A-13-F include low-voltage AC-to-DC bridge rectification, freewheeling diodes for 12 V buck and boost converters, reverse-polarity protection on USB and automotive harnesses, and OR-ing diodes in redundant power-supply rails. The combination of a 2 A continuous rating with a 40 V reverse voltage comfortably covers 12 V and 24 V bus rails with ample transient margin. When designing with this part, ensure that the SMA land pattern adheres to DO-214AC dimensions and that the thermal pad is soldered to a copper pour sized for the expected dissipation. The 0.45 V forward drop at full load represents the dominant conduction loss; for applications with continuous 2 A operation, an active cooling path or PCB heatsinking is recommended. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single source for selecting, sourcing, and second-sourcing the B240A-13-F in production designs.
BAP51-02 - RF PIN Diode 60V 50mA SOD-523 | NXP
The NXP Semiconductors BAP51-02 is a general-purpose silicon RF PIN diode rated for 60 V reverse voltage, 50 mA forward current, and 715 mW power dissipation, housed in a leaded SOD-523 surface-mount package. It is designed for RF switching and attenuator circuits where low series resistance and low capacitance at high frequencies are required. A PIN diode is a semiconductor diode with a wide, lightly doped intrinsic region sandwiched between P-type and N-type regions. Under forward bias, stored charge in the intrinsic layer makes the device behave as a current-controlled RF resistor; under reverse or zero bias, it presents a small, nearly constant capacitance. This makes PIN diodes the dominant technology for RF switches, step attenuators, antenna duplexers, and AGC circuits, sitting within the broader hierarchy of diodes, discrete semiconductors, and RF components. Key features of the BAP51-02 include its 60 V breakdown rating, which supports switching of relatively high RF swing signals, and its compact SOD-523 (SC-79) footprint of roughly 1.2 x 0.8 mm, which minimizes parasitic inductance in microwave layouts. The dual flat-lead configuration with gull-wing-free terminations supports high-volume reflow assembly. NXP characterizes the part specifically for general-purpose RF switching and attenuator service rather than rectification, distinguishing it from standard fast-recovery or signal diodes. Architecturally, the BAP51-02 uses a silicon vertical PIN structure optimized for low series resistance (RS) when forward-biased at typical RF-switch bias currents, and low junction capacitance (CT) when reverse-biased. The ratio of these two parameters determines insertion loss and isolation in series/shunt switch topologies, which is why bias-current selection is the primary design lever. Typical applications include antenna switching in wireless transceivers, RF attenuator stages in test equipment, transmit/receive switching in RFI-enabled devices, and protection clamping in RF front ends. Design consideration: keep the bias resistor path high-impedance at RF (use RF chokes or large resistors) so the diode's controlled impedance is not shunted, and verify reverse bias is maintained at peak RF voltage to avoid distortion. This page synthesizes verified distributor pricing, drop-in alternatives, comparison data, and practical design notes not found in the manufacturer datasheet.
BAP51-02,315 - PIN Diode 60V 50mA SOD-523 | NXP Semiconductors
The NXP Semiconductors BAP51-02,315 is a general-purpose silicon PIN diode rated for 60 V reverse voltage, 50 mA forward current, and 715 mW total power dissipation, supplied in the ultra-small SOD-523 (SC-79) surface-mount plastic package. A PIN diode is a semiconductor device with a wide, lightly doped intrinsic region sandwiched between P-type and N-type regions. At RF and microwave frequencies it behaves as an almost-ideal current-controlled resistance, which makes the PIN diode family the standard choice inside voltage-controlled attenuators, RF switches, phase shifters, and limiter circuits. Within the power-management hierarchy it sits under diodes -> RF diodes -> PIN diodes -> discrete semiconductor products. Key features of the BAP51-02 include a very low diode capacitance of 0.55 pF, a maximum forward voltage of 950 mV, and a 60 V breakdown rating. The low capacitance minimizes insertion loss and isolation degradation in RF signal paths up to and beyond the GHz range, while the compact 1.2 x 0.8 mm SOD-523 footprint conserves board area in dense RF modules. The intrinsic-region design gives the diode a well-controlled series resistance under forward bias, allowing accurate RF attenuation control when driven by a bias network. NXP documents the device in its BAP51-02 silicon PIN diode datasheet available as a PDF from nxp.com. Moisture sensitivity is MSL 1 with a 260 C peak reflow classification, simplifying lead-free reflow assembly. Typical applications include RF switch and SPDT antenna switch paths, PIN-diode attenuators in transceiver front ends, VHF/UHF bias-switching networks, and general-purpose high-frequency switching in industrial and communications equipment. A key design consideration: PIN diodes require DC bias current to set their RF resistance, so plan the bias network and RF choke values carefully, and derate the 715 mW dissipation above 25 C ambient. This page adds information gain beyond the datasheet by consolidating distributor pricing, drop-in cross-references, packaging details, and practical RF design notes in one place.
BAP51-03,115 - 50V RF PIN Diode SOD-323 AEC-Q101 | NXP
The NXP Semiconductors BAP51-03,115 is a general-purpose silicon RF PIN diode rated for 50V reverse voltage, 50 mA forward current and 500 mW power dissipation, housed in a 2-pin SOD-323 (SC-76) small-outline surface-mount package. It is qualified to the automotive AEC-Q101 standard and delivered in tape-and-reel packaging. A PIN diode is a semiconductor device with a wide, lightly doped intrinsic layer sandwiched between P-type and N-type regions. At RF and microwave frequencies, this intrinsic layer gives the diode a controllable resistance that varies almost linearly with forward current, while presenting a very small, nearly constant capacitance under reverse bias. This unique behavior makes PIN diodes the preferred switching and signal-control element in the RF component hierarchy, positioned alongside RF amplifiers and RF switches inside the broader radio-frequency front-end category. Key features of the BAP51-03 include low diode capacitance (0.55 pF maximum), low diode forward resistance (5.5 ohm typical series resistance at the specified forward current), and a wide operating temperature range of -65C to +150C. The combination of low capacitance and low forward resistance minimizes insertion loss when the diode conducts and reduces off-state leakage in RF signal paths, which is why it is specified for general RF applications. Technically, the silicon PIN structure provides charge storage in the intrinsic region so that the RF signal sees an averaged resistance rather than a rectifying junction. As forward bias current increases, series resistance drops toward its 5.5 ohm minimum, enabling smooth, electronically controlled attenuation. Under reverse bias, the 50 V rating and sub-picofarad capacitance keep isolation high even at high frequencies. Typical applications include RF attenuators, RF switches, antenna switching and AGC (automatic gain control) circuits in wireless receivers, as well as general RF signal conditioning in industrial and automotive radio systems where AEC-Q101 qualification is required. Design consideration: set the forward bias current through an appropriate series resistor and RF choke; attenuation linearity and distortion depend directly on maintaining adequate stored charge at the highest operating frequency. This page synthesizes distributor pricing context, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Note: per NXP product information the BAP51-03 is at end of life, so alternatives should be evaluated early in any new design. Pricing shown reflects typical distributor levels as of 2026-09-14.
BAP51-05W - Dual PIN Diode 50V SC-70 | NXP Semiconductors
The NXP Semiconductors BAP51-05W is a general-purpose silicon PIN diode pair with two series-connected elements in a common-cathode configuration, housed in a 3-pin SC-70 (SOT323) surface-mount plastic package. It is rated for a reverse voltage of 50 V, a forward current of 50 mA, and a total power dissipation of 240 mW, and is qualified to the AEC-Q101 automotive standard for discrete semiconductors. A PIN diode (positive-intrinsic-negative) is a special type of diode with a wide, lightly doped intrinsic region between the P and N layers. This intrinsic layer makes the PIN diode behave as a nearly ideal, current-controlled RF resistance when forward biased and as a low-capacitance, high-blocking element when reverse biased. Within the power-management and signal-chain hierarchy, PIN diodes belong to the RF diode family alongside varactors and Schottky diodes, and they are the standard switching element in RF front ends, attenuators, and antenna switching networks. Key features of the BAP51-05W include low diode capacitance for minimal loading of RF signal paths, low forward resistance (RF series resistance) for low insertion loss in the on-state, two matched diode elements in one package for balanced series/shunt attenuator topologies, and automotive-grade AEC-Q101 qualification. The small SC-70 footprint (2.0 x 1.25 mm body) conserves board area in dense RF modules. Architecturally, the common-cathode pair allows the device to serve as a series-connection element in voltage-variable attenuators, where one diode can be placed in the signal path and the second in a shunt or reference leg, simplifying bias networks and improving thermal tracking between elements. Because both dice share the same package thermal environment, resistance matching over temperature is superior to two discrete diodes. Typical applications include RF switching circuits in transceivers, voltage-variable attenuators in cellular and wireless infrastructure, AGC (automatic gain control) circuits, and antenna switch modules in automotive and industrial radio systems. The 50 V reverse rating also provides margin in higher-voltage bias designs. Design consideration: PIN diode RF resistance is proportional to forward bias current, so bias network stability directly determines attenuation accuracy; use a temperature-stable current source and adequate RF bypassing of the bias feed. This page synthesizes distributor pricing, drop-in alternatives, design notes, and application guidance not found in the manufacturer datasheet.
BAP64 - Silicon PIN Diode 3GHz RF Switch | NXP Semiconductors
The NXP Semiconductors BAP64 is a silicon PIN diode optimized for RF switching and attenuator applications up to 3 GHz, offered in the 3-pin SOT-23 (TO-236AB) surface-mount package with variants spanning single-diode and series-pair configurations. Family members include BAP64-02, BAP64-03, BAP64-04W (SC-70 series pair, 100V, 100 mA, 240 mW) and BAP64-06 (SOT-23, 175V), all sharing the same underlying PIN die technology with low series resistance and high reliability. A PIN diode is a semiconductor device with a lightly doped intrinsic layer sandwiched between P-type and N-type regions. Under forward bias, stored carriers in the intrinsic region make the diode behave as a current-controlled resistor; under reverse bias it behaves as a small, nearly-lossless capacitor. This unique characteristic makes PIN diodes the preferred switching and variable-attenuation element in RF and microwave signal chains, sitting within the broader hierarchy of diodes, discrete semiconductors, and RF components. Key features of the BAP64 family include operation to 3 GHz, low series resistance in forward conduction, low capacitance in the reverse-bias state for minimal insertion loss, and voltage ratings from 100V to 175V depending on the suffix. The SOT-23/TO-236AB package provides a compact footprint for high-density RF boards, and the BAP64-04W variant comes in the even smaller SC-70 package as a series-connected pair for T/R switch topologies. Architecturally, the BAP64 die uses a silicon PIN structure engineered for fast carrier lifetime and controlled charge storage, so it switches cleanly at RF without generating the harmonic distortion typical of ordinary rectifier diodes. High reverse breakdown voltage allows use in antenna-line switching, PIN attenuator ladders, and protection circuits handling substantial RF power. Typical applications include RF antenna switch modules, transmit/receive switching in wireless transceivers, RF attenuator networks in test equipment, and ESD/overvoltage clamping on antenna lines up to 3 GHz. When designing with BAP64 diodes, always provide adequate forward bias current: series resistance falls with increased forward current, so attenuation accuracy and linearity depend directly on the bias network. Verify the suffix-specific breakdown voltage against your worst-case RF peak voltage. This page synthesizes distributor pricing, drop-in alternatives, application guidance, and design notes not found in a single manufacturer datasheet.
BAP64-03,115 - 175V Silicon PIN Diode SOD-323 | NXP
The NXP BAP64-03,115 is a high-voltage silicon PIN diode designed as a current-controlled RF resistor, rated for 175 V reverse voltage, 100 mA forward current, and 500 mW power dissipation, housed in a leaded SOD-323 surface-mount package. It exhibits a very low diode capacitance of 0.35 pF maximum and a low forward resistance of 0.7 ohm typical, making it optimized for RF attenuator and RF switch circuits. A PIN diode is a special class of diode with a wide, lightly doped intrinsic (I) layer sandwiched between P-type and N-type regions. In the RF domain, this intrinsic layer makes the device behave like a current-controlled resistor at RF frequencies while presenting low capacitance when reverse-biased. PIN diodes sit within the broader hierarchy of RF semiconductors: discrete diodes -> RF diodes -> PIN diodes, and are fundamental building blocks of variable attenuators, RF switches, phase shifters, and limiter circuits in wireless and instrumentation systems. Key features of the BAP64-03 include high reverse voltage of 175 V, low diode capacitance of 0.35 pF, low forward resistance of 0.7 ohm at rated current, and low series inductance thanks to the compact SOD-323 outline. These parameters directly translate into low insertion loss, high isolation, and low distortion in RF signal-path designs, particularly at VHF through microwave frequencies where stray capacitance and package parasitics dominate performance. Architecturally, the BAP64-03 uses a silicon vertical PIN structure engineered for a wide intrinsic region, which raises the carrier storage time and yields a more linear resistance-versus-current transfer characteristic than a conventional PN junction diode. This makes it well suited for precise, current-controlled attenuation in AGC and gain-control loops. Typical applications include RF attenuators, antenna-switch modules, VCO tuning circuits, and RF protection/limiting circuits in wireless infrastructure, test equipment, and professional communication radios. Designers should note the forward-current-to-resistance relationship: RF resistance is controlled by DC bias current, so bias network design determines distortion and control range. Note that NXP has marked the BAP64-03 as End of Life, so new designs should evaluate drop-in alternatives. This page adds value beyond the datasheet by compiling distributor pricing, drop-in alternatives, lifecycle status, and practical design notes in one place.
BAP64-05-TP - 175V Dual PIN Diode 3GHz SOT-23 | MCC
The Micro Commercial Components (MCC) BAP64-05-TP is a dual silicon PIN diode in a common-cathode configuration, rated 175 V reverse voltage, 100 mA forward current and 250 mW power dissipation, housed in a 3-pin SOT-23 surface-mount package. It is designed as a current-controlled RF resistor for RF attenuators and RF switches operating up to 3 GHz. A PIN diode is a semiconductor diode with a wide, lightly doped intrinsic (I) layer sandwiched between P-type and N-type regions. Unlike a standard PN junction diode, the intrinsic layer gives the PIN diode a controllable resistance under forward bias and very low capacitance under reverse bias, making it the preferred switching and variable-resistance element in the RF front-end hierarchy of antennas, transceivers and test equipment. Key features include very low diode capacitance (0.35 pF typical at 20 V reverse bias, 1 MHz), low diode forward resistance for low insertion loss, and low series inductance for minimal parasitic impact in high-frequency layouts. The dual common-cathode arrangement (anode-cathode-anode pinning: pin 1 anode, pin 2 common cathode, pin 3 anode) simplifies shunt/series attenuator topologies such as T-bridged and Pi attenuator networks. Architecturally, the device is a silicon epitaxial PIN structure in an epoxy package meeting UL 94 V-0 flammability classification, with moisture sensitivity level 1 and a matte tin-plated, lead-free finish. Operating junction temperature spans -65 C to +150 C. As frequency rises, the stored charge in the intrinsic layer keeps the diode impedance linear and resistive, which is why this part stays usable to 3 GHz. Typical applications include RF antenna switch matrices, step and variable RF attenuators in cellular and broadband equipment, transmit/receive switching in RF front ends, and protect/bias switching circuits in RF instrumentation. Design consideration: because the PIN diode is a current-controlled resistor, RF performance depends directly on the forward bias current source quality - use a stable, low-noise DC bias network and adequate DC-blocking capacitors to isolate RF from the control path. This page synthesizes distributor pricing, drop-in alternatives, pinout detail, and practical design notes not found in a single manufacturer datasheet.
BAP64-05W,115 - Dual PIN Diode 100V SC-70 | NXP
The NXP Semiconductors BAP64-05W,115 is a dual silicon PIN diode pair in common cathode configuration, rated 100 V reverse voltage, 100 mA forward current and 240 mW power dissipation, housed in a 3-pin SC-70 (SOT323) surface-mount package for RF switching and attenuation to 3 GHz. A PIN diode is a type of radio-frequency semiconductor diode with a wide, lightly doped intrinsic (I) layer sandwiched between P-type and N-type regions. This intrinsic layer gives the PIN diode a current-controlled resistance characteristic at RF frequencies: at high frequency it behaves as an almost pure resistor whose value is set by the DC forward bias current, while blocking when reverse biased. Within the diode family hierarchy, PIN diodes sit alongside switching and rectifier diodes as RF signal-path elements rather than power-conversion devices. Key features of the BAP64-05W include high-voltage, current-controlled RF resistance, low diode capacitance for minimal insertion loss in off-state, low forward resistance for low on-state insertion loss, and low series inductance thanks to the compact SC-70 outline. Two planar PIN diodes share a common cathode, allowing series/shunt attenuator and SPDT switch topologies from a single package. According to the NXP datasheet, the device is specified for applications up to 3 GHz. Architecturally, the planar PIN structure provides low minority-carrier lifetime effects suited to RF attenuation, where the diode operates as a linear RF resistor under forward bias. The common-cathode pairing halves board area versus two discrete SOD-323 parts and keeps parasitic inductance symmetrical, improving attenuator flatness across the band. Typical applications include RF attenuator stages in wireless infrastructure, antenna switch modules, RF AGC circuits in receivers, and VSWR-protection switching in transmitters. The 100 V rating gives ample margin in 50-ohm systems with high RF swing. Design consideration: the RF resistance is set by forward bias current, so bias networks must be isolated from the RF path with chokes or high-value resistors to preserve linearity. This page synthesizes distributor pricing tiers, drop-in alternative comparisons, and practical design notes not found in the manufacturer datasheet alone.
BAP65-02,115 - 30V 100mA RF PIN Diode SOD-523 | NXP
The NXP Semiconductors BAP65-02,115 is a silicon planar PIN diode for RF attenuator and switching applications, rated 30V reverse voltage, 100 mA forward current and 715 mW total power dissipation, housed in the ultra-small SOD-523 surface-mount plastic package (ordering suffix ,115). Its maximum diode capacitance is 0.9 pF and its low forward resistance of approximately 1 ohm minimizes insertion loss in RF signal paths. A PIN diode is a silicon diode with an intrinsic (undoped) semiconductor layer sandwiched between the P-type and N-type regions. Under forward bias, stored carriers in the intrinsic layer make the device behave as a current-controlled RF resistor; under reverse bias it acts as a small, nearly constant capacitance. This combination makes PIN diodes the standard control element in RF switches, step attenuators, AGC circuits and transmit/receive paths, sitting within the broader hierarchy of diodes -> RF diodes -> discrete semiconductors. Key features include low diode capacitance (0.9 pF max), low forward resistance (about 1 ohm, for low RF loss), very low series inductance from the SOD-523 leadframe, and high-voltage, current-controlled behavior suited to linear attenuator designs. NXP characterizes the BAP65-02 series specifically as a series diode for mobile communication transmit/receive switches. Architecturally, the planar PIN structure provides a thick intrinsic region whose carrier lifetime supports RF switching up into the GHz range while maintaining a clean, low-Q capacitance in the off state, which improves switch isolation and attenuator linearity. Typical applications include RF attenuator and switch circuits in mobile communication handsets, transmit/receive switching in wireless modules, and AGC/variable-attenuator functions in RF front ends. Note: this part is NOT RECOMMENDED FOR NEW DESIGNS per NXP documentation; new designs should evaluate the current-generation alternatives listed on this page. Design consideration: RF performance depends strongly on bias network layout - keep the RF choke and DC-blocking capacitors close to the diode and place ground vias directly at the SOD-523 pads to exploit the very low series inductance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
BAP65-03,115 - RF PIN Diode 30V 100mA SOD-323 | NXP
The NXP BAP65-03,115 is a silicon PIN diode designed as a current-controlled RF resistor for RF switch and attenuator applications, rated for 30 V reverse voltage, 100 mA forward current, and 500 mW power dissipation in a 2-pin SOD-323 (SC-76) surface-mount plastic package. A PIN diode is a semiconductor device with a wide, lightly doped intrinsic layer sandwiched between P-type and N-type regions. At RF frequencies, its forward-biased resistance varies linearly with DC bias current, making it behave as a current-controlled RF resistor. This property places PIN diodes within the broader diode family alongside rectifier, Schottky, and varactor diodes, and makes them essential elements in RF front-end design for switching, attenuating, and phase-shifting signal paths. Key features of the BAP65-03 include a very low diode capacitance of 0.9 pF, a low forward resistance of 0.35 ohm for minimal insertion loss, and very low series inductance due to the compact SOD-323 package. These parameters combine to give low loss and high isolation in RF switch circuits, and the planar construction supports the high breakdown voltage needed for demanding RF front ends. Architecturally, the device uses NXP's planar silicon PIN process. The thick intrinsic layer yields a nearly constant series resistance across a wide current range and a sharp transition between the off-state (dominated by the 0.9 pF capacitance) and the on-state (dominated by the 0.35 ohm resistance), which is precisely the behavior required for SPDT and SPDT-cascaded antenna and filter switching networks. Typical target applications include RF switch modules for wireless transceivers, antenna switching in cellular and ISM-band systems, RF attenuators, and protection or bypass switching in front-end modules. The AEC-Q101 qualification of the ,115 ordering code further supports automotive-connected RF subsystems. A key design consideration is bias current: the RF resistance is set by the DC forward current, so the bias network must be stiff and filtered to prevent RF leakage into the control line. Note also that this part is flagged End-of-Life / not recommended for new designs by NXP. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
BAP65-05,215 - Dual PIN Diode 30V SOT-23 RF Switch | NXP
The NXP Semiconductors BAP65-05,215 is a dual-element silicon PIN diode in common cathode configuration, rated 30 V reverse voltage, 100 mA maximum forward current and 250 mW power dissipation, housed in a 3-pin SOT-23 (TO-236AB) surface-mount package. It functions as a high-voltage, current-controlled RF resistor for RF switch and attenuator circuits, with low diode capacitance of 0.425 pF at 20 V reverse bias (1 MHz) and low forward resistance for minimal insertion loss. A PIN diode is a silicon semiconductor device with a wide, lightly doped intrinsic layer between P and N regions. In RF systems, it behaves as a current-controlled resistor: under forward bias its RF resistance drops to a few ohms, while under reverse bias it acts as a small, nearly lossless capacitor. This makes PIN diodes the preferred switching and variable-attenuation element in RF front ends, where mechanical relays or FETs would introduce unacceptable distortion or capacitance. Key features of the BAP65-05 include two elements sharing a common cathode, enabling series-SPDT and series-shunt switch topologies in a single 3-pin package; low diode capacitance that minimizes off-state feedthrough at VHF through microwave frequencies; and low forward resistance that reduces on-state insertion loss. The 30 V breakdown rating supports RF switch stacks in higher-voltage PA bias switching and TDD radios. Because both diodes share one die-level structure, RF designers achieve matched on-resistance and capacitance between series and shunt arms, improving switch isolation symmetry. The SOT-23 footprint keeps parasitic inductance low, and the device is supplied in Tape & Reel (suffix ,215) for automated pick-and-place assembly. Typical applications include antenna RF switch matrices, transmit/receive switching in wireless transceivers, RF attenuator networks, and broadband RF switching in test instrumentation. Design consideration: PIN diode carriers (stored charge) determine switching speed and low-frequency distortion; keep forward bias current sufficiently high for the RF signal amplitude to avoid intermodulation. This page synthesizes distributor pricing, drop-in alternative analysis, pinout data, and practical RF design notes not found in the manufacturer datasheet.