Infineon Technologies BCR191WE6327

Overview

BCR191WE6327 from Infineon Technologies is a PNP silicon digital transistor with integrated bias resistors (R1 = R2 = 22 kΩ), designed for switching, inverting, and interface driver functions in automotive and industrial control circuits. It supports 50 V V_CEO, 100 mA I_C, 0.3 V V_CE(sat) at 10 mA/0.5 mA drive, and operates up to 150 °C junction temperature.

For engineers reviewing the BCR191WE6327 datasheet, BCR191WE6327 pinout, BCR191WE6327 application, or BCR191WE6327 equivalent, this part serves as a RoHS-compliant, AEC-Q101-qualified SOT323-packaged digital transistor optimized for low-power logic-level interfacing, microcontroller GPIO buffering, and automotive body electronics load switching.

Technical Context

This device integrates two precision 22 kΩ bias resistors (R1 from base to emitter, R2 from base to collector) to enable single-resistor external drive, simplifying PCB layout and reducing component count in level-shifting and signal inversion stages. Its PNP topology provides active-low switching capability with defined input thresholds: Vi(on) = 1–2.5 V and Vi(off) = 0.8–1.5 V at specified test conditions.

The transistor delivers h_FE ≥ 50 at I_C = 5 mA/V_CE = 5 V and f_T = 200 MHz, supporting high-speed digital switching up to ~10 MHz in typical gate-drive applications. Thermal resistance R_thJS ≤ 105 K/W (SOT323 package) ensures stable operation under pulsed loads with duty cycles ≤ 2% and pulse widths < 300 µs.

Key Specifications

Pinout & Package

SOT323 package: 3-pin surface-mount plastic case with gull-wing leads, footprint compatible with JEDEC MO-203AA, thermal pad not present, rated for 250 mW at T_S ≤ 124 °C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCR191WE6327, BCR193WE6327 offers complementary NPN functionality for low-side switching, while NSVD120DP033T1G provides lower V_CE(sat) and higher input threshold-both require schematic and layout adaptation but retain similar power handling and thermal performance.

Availability

BCR191WE6327 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input modules, consumer appliance motor controls, and IoT edge node power sequencing requiring stable component supply and AEC-Q101 compliance.

Supply support for BCR191WE6327 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 aligned to ISO/TS 16949.

BCR191WE6327 belongs to Infineon's BCR series of digital transistors, engineered specifically for cost-sensitive, high-reliability switching applications in automotive and industrial environments where integration, qualification, and thermal robustness are critical.

FAQ

What is the function of the internal R1 and R2 resistors in BCR191WE6327?

The internal R1 (base-to-emitter) and R2 (base-to-collector) resistors form a precision voltage divider that defines the input threshold and prevents base floating. R1 = R2 = 22 kΩ ensures Vi(on) ≈ 1–2.5 V and Vi(off) ≈ 0.8–1.5 V, enabling direct logic-level drive without external components while maintaining stable switching behavior over temperature.

Can BCR191WE6327 replace a standard PNP BJT like BC807 in a switching circuit?

Yes, but only if the circuit design accounts for its integrated bias network. Unlike BC807, BCR191WE6327 has no standalone base terminal-it accepts a single input at pin 1. External base resistors must be removed, and drive voltage must fall within Vi(on)/Vi(off) range. Saturation performance is comparable, but gain is not adjustable.

Is BCR191WE6327 suitable for 1.8 V logic interfacing?

No. Its Vi(on) minimum is 1.0 V, but typical operation starts reliably above 1.5 V; at 1.8 V, margin is insufficient for guaranteed turn-on across voltage tolerance, temperature, and process variation. It is optimized for 3.3 V and 5 V logic families, not sub-2 V microcontrollers.

What does AEC-Q101 qualification mean for BCR191WE6327 in practice?

AEC-Q101 qualification confirms that BCR191WE6327 has passed stress tests including HTSL (1000 h at 150 °C), TC (1000 cycles −40 °C to +125 °C), and ESD (HBM ≥ 2 kV), making it suitable for automotive under-hood and cabin applications where long-term reliability under thermal and electrical stress is mandatory.