Infineon Technologies BCR135WE6327BTSA1

Overview

BCR135WE6327BTSA1 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 AEC-Q101 qualification.

For engineers reviewing the BCR135WE6327BTSA1 datasheet, BCR135WE6327BTSA1 pinout, BCR135WE6327BTSA1 application, or BCR135WE6327BTSA1 equivalent, key selection criteria include built-in resistor ratio (R1/R2 = 0.21), thermal resistance (R_thJS ≤ 105 K/W), SOT323 package footprint, and guaranteed operation up to T_j = 150 °C.

Technical Context

This device integrates two matched NPN transistors in a single SOT323 package with isolated die-enabling compact dual-channel logic-level switching without external bias networks. Its internal R1–R2 network sets fixed base drive, eliminating discrete resistor placement while maintaining Vi(on) = 0.5–1.4 V and Vi(off) = 0.5–1 V across temperature.

The transistor operates in common-emitter configuration with h_FE ≥ 70 at I_C = 5 mA/V_CE = 5 V and f_T = 150 MHz, supporting high-speed digital signal routing in space-constrained PCBs where thermal management is critical (P_tot = 250 mW at T_S ≤ 124 °C).

Key Specifications

Pinout & Package

SOT323 package: 3-pin surface-mount plastic case with gull-wing leads, 1.3 mm × 2.13 mm footprint, 0.95 mm height, and moisture sensitivity level (MSL) 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCR135WE6327BTSA1, the BCR135S offers dual-channel independence at the expense of larger SOT363 footprint, while BC847BW demands external bias design effort but delivers higher h_FE and lower V_CE(sat) in optimized layouts.

Availability

BCR135WE6327BTSA1 is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC output stages, LED signage drivers, and smart sensor interfaces requiring stable component supply and AEC-Q101 compliance.

Supply support for BCR135WE6327BTSA1 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.

The BCR135 series belongs to Infineon's automotive-qualified digital transistor product line, engineered specifically for robust, resistor-equipped switching in harsh-environment control nodes.

FAQ

What is the maximum continuous collector current for BCR135WE6327BTSA1?

The absolute maximum continuous collector current is 100 mA at T_S ≤ 124 °C. Derating applies above this temperature: P_tot decreases linearly to zero at 150 °C junction temperature. Pulse operation allows higher peak currents (e.g., 200 mA for t_p < 300 µs, D < 2%), as confirmed in the permissible pulse load curves.

Can BCR135WE6327BTSA1 replace a standard BJT like BC847 in existing designs?

Yes, but only if the base drive circuit is redesigned to remove external bias resistors. BCR135WE6327BTSA1 has internal R1/R2 (10 kΩ/47 kΩ), so connecting its base directly to a microcontroller GPIO will yield different switching thresholds than a bare BJT. Layout changes and timing validation are required before substitution.

Is the SOT323 package lead-free and RoHS compliant?

Yes - BCR135WE6327BTSA1 uses a Pb-free (RoHS-compliant) SOT323 package with matte tin-plated leads. The device meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 and supports standard reflow profiles including IPC/JEDEC J-STD-020D.

How does the built-in resistor ratio affect logic-level compatibility?

The R1/R2 ratio of 0.21 (10 kΩ/47 kΩ) sets the internal voltage divider that defines Vi(on) (0.5–1.4 V) and Vi(off) (0.5–1 V). This ensures reliable turn-on with 3.3 V CMOS outputs and immunity to noise below 0.5 V, eliminating need for Schmitt-trigger buffers in most microcontroller-driven switching applications.