Infineon Technologies BCR142B6327HTLA1

Overview

BCR142B6327HTLA1 from Infineon Technologies is an NPN silicon digital transistor with integrated bias resistors (R1 = 22 kΩ, R2 = 47 kΩ), designed for switching, inverting, interface, and driver circuits in automotive and industrial control systems. 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 BCR142B6327HTLA1 datasheet, BCR142B6327HTLA1 pinout, BCR142B6327HTLA1 application, or BCR142B6327HTLA1 equivalent, this page delivers verified electrical characteristics, thermal performance curves, SOT23 package details, and automotive-grade reliability data to support circuit-level validation and BOM selection.

Technical Context

This digital transistor integrates two on-chip resistors to enable direct logic-level drive without external base bias components. Its R1/R2 ratio of 0.47 ensures stable saturation under varying temperature conditions (–40 °C to 125 °C) and supports reliable switching in low-voltage microcontroller interfaces.

The device operates in common-emitter configuration with h_FE ≥ 70 at I_C = 5 mA / V_CE = 5 V, f_T = 150 MHz, and C_cb = 3 pF - enabling fast edge response in signal routing and level-shifting applications where parasitic capacitance must be minimized.

Key Specifications

Pinout & Package

BCR142B6327HTLA1 is housed in a RoHS-compliant SOT23 plastic package (JEDEC TO-236AB), with standard 3-pin lead frame and 1.3 mm pitch. Pin 1 = Base (with internal R1/R2 network), Pin 2 = Emitter, Pin 3 = Collector.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCR142W and NSV14201T1G, BCR142B6327HTLA1 offers optimal balance of thermal robustness (200 mW @ 102 °C), industry-standard SOT23 footprint, and proven field reliability in automotive ECUs - making it preferred for new designs requiring legacy-compatible packaging and predictable derating behavior.

Availability

BCR142B6327HTLA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, consumer appliance motor control, and medical equipment fan regulation requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for BCR142B6327HTLA1 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 AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and industrial control devices, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.

BCR142 belongs to Infineon's BCR family of digital transistors engineered for automotive-grade signal switching and interface isolation - targeting cost-sensitive, high-volume applications where integration, reliability, and qualification compliance are mandatory.

FAQ

What is the maximum allowable junction temperature for BCR142B6327HTLA1?

The absolute maximum junction temperature (T_j) is 150 °C, as specified in the Infineon datasheet. Operation above this value risks permanent degradation of the epitaxial layer and bias resistor stability. Derating begins at T_S = 102 °C for the SOT23 package, where total power dissipation must be reduced linearly to zero at 150 °C junction temperature.

Can BCR142B6327HTLA1 replace a standard NPN BJT like BC847 in a switching circuit?

Yes, but only when the base drive is logic-level (e.g., 3.3 V or 5 V MCU output) and no external bias resistors are used. Unlike BC847, BCR142B6327HTLA1 has internal R1/R2, so connecting base directly to MCU GPIO avoids saturation issues - however, it cannot replicate adjustable bias configurations or analog amplification modes.

Is the R1/R2 ratio temperature-stable across the full operating range?

Yes - measured R1/R2 remains within 0.42–0.52 from –40 °C to 125 °C, ensuring consistent input threshold behavior. This stability is achieved through matched polysilicon resistor design and is confirmed by characterization data in Figure 3 of the datasheet showing Vi(on) and Vi(off) variation over temperature.

Does BCR142B6327HTLA1 require a flyback diode when switching inductive loads?

Yes - although V_CEO is rated at 50 V, inductive kickback during turn-off can exceed this rating. A 1N4148 or similar fast-switching diode must be placed cathode-to-collector, anode-to-emitter to clamp transient voltage and protect the internal junction and bias resistors from avalanche overstress.