Infineon Technologies BCR135E6359HTMA1

Overview

BCR135E6359HTMA1 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 BCR135E6359HTMA1 datasheet, BCR135E6359HTMA1 pinout, BCR135E6359HTMA1 application, or BCR135E6359HTMA1 equivalent, key selection criteria include built-in resistor ratio (R1/R2 = 0.21), thermal resistance R_thJS ≤ 240 K/W, junction temperature rating of 150 °C, and SOT23 package compatibility with automated PCB assembly.

Technical Context

This digital transistor integrates two precision bias resistors to eliminate external components in saturated-switch configurations. Its fixed R1/R2 ratio enables predictable turn-on/off thresholds (V_i(on) = 0.5–1.4 V, V_i(off) = 0.5–1 V) and stable DC current gain (h_FE ≥ 70 at I_C = 5 mA).

The device operates in common-emitter configuration with f_T = 150 MHz and C_cb = 3 pF, supporting high-speed digital switching up to ~10 MHz in logic-level interfacing. Thermal derating follows a defined P_tot vs. T_S curve, with full 200 mW dissipation permitted only below 102 °C case temperature.

Key Specifications

Pinout & Package

BCR135E6359HTMA1 is housed in a standard SOT23 plastic surface-mount package (3-pin, 1.3 mm × 2.9 mm footprint), optimized for high-density PCB layouts and reflow soldering. Pin 1 = Base (B), Pin 2 = Emitter (E), Pin 3 = Collector (C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC847B,115 and NSVD120DP033T1G, BCR135E6359HTMA1 offers plug-and-play switching with fixed biasing-reducing validation effort and layout risk-while maintaining AEC-Q101 compliance critical for automotive deployment.

Availability

BCR135E6359HTMA1 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller interface modules, relay driver stages, and automotive body control units requiring stable component supply and automotive-grade reliability.

Supply support for BCR135E6359HTMA1 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 infrastructure.

BCR135E6359HTMA1 belongs to Infineon's BCR family of digital transistors-engineered specifically for simplified, high-reliability switching in automotive and industrial control systems where space, BOM count, and qualification rigor are critical.

FAQ

What is the maximum continuous collector current for BCR135E6359HTMA1?

The absolute maximum continuous collector current is 100 mA at T_S ≤ 102 °C. Derating applies above this case temperature per the published P_tot(T_S) curve. Pulse operation allows higher peak currents (e.g., 200 mA) with duty cycle and pulse width constraints defined in the permissible pulse load graphs.

Does BCR135E6359HTMA1 require external base resistors?

No. It integrates R1 = 10 kΩ and R2 = 47 kΩ internally, enabling direct connection of digital logic outputs to Pin 1 (Base). This eliminates external biasing components and simplifies PCB layout, especially in space-constrained automotive modules.

Is BCR135E6359HTMA1 suitable for 3.3 V microcontroller interfacing?

Yes. Its V_i(on) range (0.5–1.4 V) ensures reliable turn-on from 3.3 V CMOS outputs, and V_i(off) (0.5–1 V) provides noise margin against false triggering. The device maintains h_FE ≥ 70 down to –40 °C, supporting robust operation across automotive temperature ranges.

How does the AEC-Q101 qualification impact design validation?

AEC-Q101 qualification confirms that BCR135E6359HTMA1 has passed stress tests including HTOL, temperature cycling, and ESD (HBM ≥ 2 kV), eliminating the need for duplicate qualification testing in automotive programs. This accelerates time-to-market for body control, lighting, and comfort systems.