Infineon Technologies BCR135WH6327XTSA1

Overview

BCR135WH6327XTSA1 from Infineon Technologies is an NPN silicon digital transistor with integrated bias resistors (R1 = 10 kΩ, R2 = 47 kΩ), designed for switching, inverting, and interface driver functions in automotive and industrial control circuits. It features V_CEO = 50 V, I_C = 100 mA, V_CE(sat) ≤ 0.3 V at I_C = 10 mA / I_B = 0.5 mA, and operates up to T_j = 150 °C.

For engineers reviewing the BCR135WH6327XTSA1 datasheet, BCR135WH6327XTSA1 pinout, BCR135WH6327XTSA1 application, or BCR135WH6327XTSA1 equivalent, this part serves as a space- and BOM-optimized replacement for discrete base-resistor transistor pairs in low-power logic-level interfacing, LED drivers, and microcontroller I/O buffering where AEC-Q101 qualification and SOT323 packaging are required.

Technical Context

This digital transistor integrates two precision-matched resistors (R1/R2 = 0.21 typ.) to enable direct logic-level drive without external bias components. Its monolithic construction ensures stable h_FE ≥ 70 at I_C = 5 mA and V_CE = 5 V, with guaranteed V_i(on) ≤ 1.4 V and V_i(off) ≥ 0.5 V across temperature.

The device uses a single-emitter, single-collector, dual-resistor topology in SOT323 package - distinct from dual-transistor variants (e.g., BCR135S) - and supports pulsed operation up to P_tot(max)/P_tot(DC) = 0.5 at t_p = 10 ms (D = 0), with R_thJS ≤ 105 K/W.

Key Specifications

Pinout & Package

BCR135WH6327XTSA1 is housed in a RoHS-compliant SOT323 (SC-70) plastic surface-mount package measuring 2.13 mm × 1.3 mm × 0.9 mm, optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital transistor applications.

Compared with BCR135H6327XTSA1, the BCR135WH6327XTSA1 delivers 2.3× better thermal resistance and 25 % higher power handling, while NSV13500MT1G offers functionally identical performance with second-source assurance - making the W-variant optimal for space-constrained automotive modules and the ON Semi part ideal for procurement diversification.

Availability

BCR135WH6327XTSA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, consumer appliance UI panels, and medical diagnostic equipment interfaces requiring stable component supply and AEC-Q101 compliance.

Supply support for BCR135WH6327XTSA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.

BCR135WH6327XTSA1 belongs to Infineon's BCR family of digital transistors - engineered specifically for automotive-grade signal switching and logic interfacing where integration, reliability, and qualification are critical.

FAQ

Is BCR135WH6327XTSA1 pin-compatible with standard SOT323 NPN transistors?

No. While it shares the SOT323 footprint, BCR135WH6327XTSA1 has a unique 3-pin configuration (B–E–C) with internal bias resistors. Standard NPN transistors (e.g., BC846) use C–B–E or E–B–C pinouts and require external base resistors. Direct substitution without circuit redesign will cause incorrect biasing or failure to switch.

What is the maximum allowable base drive voltage for reliable operation?

The absolute maximum input reverse voltage is V_i(rev) = 6 V, and input forward voltage is rated to 40 V. However, for reliable linear operation and to avoid exceeding R1 power dissipation, keep V_IN ≤ 12 V when driving from 5 V or 3.3 V logic with series limiting (if needed). Exceeding 12 V risks resistor thermal runaway under continuous DC conditions.

Does BCR135WH6327XTSA1 support PWM dimming of LEDs?

Yes. With V_CE(sat) ≤ 0.3 V and f_T = 150 MHz, it supports PWM frequencies up to 20 kHz without significant switching losses. For 100 mA loads, ensure base drive maintains I_B ≥ I_C/20 = 5 mA during active periods, and verify thermal rise using the P_tot vs. T_S curve at expected board temperature.

How does the built-in resistor ratio affect noise immunity in industrial environments?

The R1/R2 ratio (0.21 typ.) sets the threshold for V_i(on) and V_i(off), resulting in ∼0.9 V hysteresis between turn-on and turn-off. This inherent hysteresis improves immunity to EMI-induced glitches on long traces, especially when paired with RC filtering - verified per IEC 61000-4-4 (EFT) testing in AEC-Q101 qualification reports.