Infineon Technologies BCR135E6433HTMA1

Overview

BCR135E6433HTMA1 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 low-power logic-level signal translation circuits. It supports 50 V V_CEO, 100 mA I_C, 0.3 V V_CE(sat) at I_C/I_B = 20, and operates up to 150 MHz f_T, commonly used in automotive body control modules and industrial sensor interface boards.

For engineers reviewing the BCR135E6433HTMA1 datasheet, BCR135E6433HTMA1 pinout, BCR135E6433HTMA1 application, or BCR135E6433HTMA1 equivalent, key selection criteria include built-in resistor ratio (R1/R2 = 0.21), AEC-Q101 qualification, SOT23 package thermal resistance (R_thJS ≤ 240 K/W), and guaranteed V_i(off) ≤ 1 V at I_C = 100 µA.

Technical Context

This digital transistor integrates two precision bias resistors to eliminate external components in saturated-switch configurations. Its R1–R2 network enables direct TTL/CMOS-level drive without base current limiting, while maintaining stable h_FE ≥ 70 at I_C = 5 mA and V_CE = 5 V across −40°C to 125°C.

The device uses a monolithic NPN structure with isolated emitter-base-collector junctions, supporting common-emitter switching with defined V_i(on) (0.5–1.4 V) and V_i(off) (0.5–1 V) thresholds-critical for noise-immune digital input conditioning in automotive microcontroller interfaces.

Key Specifications

Pinout & Package

SOT23-3 surface-mount package with gull-wing leads, 1.3 mm pitch, and JEDEC-compliant footprint (3.15 × 1.75 × 1.15 mm). Thermal resistance R_thJS ≤ 240 K/W enables 200 mW power dissipation at T_S ≤ 102°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC847BW,115, BCR135E6433HTMA1 reduces component count and improves noise immunity; versus NSV13500T1G, it trades 0.05 V lower V_CE(sat) for tighter thermal derating above 102°C case temperature.

Availability

BCR135E6433HTMA1 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input stages, and medical diagnostic equipment requiring stable component supply with AEC-Q101 assurance and RoHS compliance.

Supply support for BCR135E6433HTMA1 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 ICs, and discrete devices, with global manufacturing and quality systems certified to IATF 16949.

The BCR135 series belongs to Infineon's automotive-qualified digital transistor family, engineered specifically for replacing mechanical relays and discrete BJT/resistor combinations in 12 V/24 V electronic control units.

FAQ

What is the maximum operating temperature for BCR135E6433HTMA1?

The absolute maximum junction temperature is 150 °C, with a maximum soldering point temperature of 102 °C for the SOT23 package. Derating begins above this point: total power dissipation drops linearly to zero at 150 °C junction temperature, per the P_tot vs. T_S curve in the datasheet.

Does BCR135E6433HTMA1 support 3.3 V logic-level drive?

Yes - its V_i(on) range (0.5–1.4 V) ensures reliable turn-on with 3.3 V CMOS/TTL outputs, and V_i(off) ≤ 1 V provides noise margin against sub-1 V interference. No level shifter is needed, making it ideal for direct MCU GPIO interfacing.

Is BCR135E6433HTMA1 pin-compatible with other SOT23 digital transistors?

It uses standard SOT23-3 pinout (1=B, 2=E, 3=C), matching industry conventions. However, internal resistor values differ across manufacturers - verify R1/R2 tolerance and V_i(on)/V_i(off) specs before substitution, as electrical behavior is not guaranteed across brands despite identical physical layout.

How does AEC-Q101 qualification impact BCR135E6433HTMA1's use in non-automotive applications?

AEC-Q101 validation confirms robustness against temperature cycling, humidity, and high-temperature operating life - benefits industrial and medical applications requiring long-term reliability. It does not restrict usage outside automotive, but guarantees performance under accelerated stress conditions beyond standard industrial grade.