Infineon Technologies BCR133E6433HTMA1

Overview

BCR133E6433HTMA1 from Infineon Technologies is an NPN silicon digital transistor with integrated bias resistors (R1 = R2 = 10 kΩ), designed for low-power switching in interface, inverter, and driver 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 °C junction temperature in automotive-grade AEC-Q101-qualified SOT23 package.

For engineers reviewing the BCR133E6433HTMA1 datasheet, BCR133E6433HTMA1 pinout, BCR133E6433HTMA1 application, or BCR133E6433HTMA1 equivalent, this part delivers verified digital switching performance with built-in resistor matching, thermal robustness up to 124 °C case temperature, and RoHS-compliant lead-free packaging suitable for space-constrained PCB layouts.

Technical Context

This digital transistor integrates two matched 10 kΩ bias resistors to enable direct logic-level drive without external components, reducing component count in level-shifting and signal conditioning paths. Its common-emitter configuration supports DC current gain (h_FE) ≥30 at I_C = 5 mA and V_CE = 5 V, with input on/off thresholds tightly specified at 1–2.5 V and 0.8–1.5 V respectively.

The device exhibits f_T = 130 MHz and C_cb = 3 pF at V_CB = 10 V, enabling stable high-speed switching up to ~10 MHz in buffered gate-drive or digital isolation applications. Thermal resistance R_thJS ≤ 240 K/W ensures reliable operation under pulsed loads with duty cycle <2%.

Key Specifications

Pinout & Package

BCR133E6433HTMA1 is housed in a standard SOT23 surface-mount package (3-pin, 1.3 mm × 2.9 mm footprint) with gull-wing leads. 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 BC847BW, BCR133E6433HTMA1 reduces bill-of-materials and layout area by integrating biasing; versus NSV13331T1G, it offers proven field reliability at lower cost but with narrower voltage margin and older AEC-Q101 revision.

Availability

BCR133E6433HTMA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and medical device power sequencing requiring stable component supply and long-term manufacturability.

Supply support for BCR133E6433HTMA1 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 certification to ISO/TS 16949.

BCR133E6433HTMA1 belongs to Infineon's BCR family of digital transistors, engineered for simplified logic interfacing in automotive and industrial control systems where board space and assembly cost are critical constraints.

FAQ

What is the maximum allowable continuous collector current for BCR133E6433HTMA1?

The absolute maximum continuous collector current is 100 mA at T_S ≤ 102 °C. Derating is required above this case temperature per the P_tot vs. T_S curve; at 125 °C case temperature, maximum I_C drops to approximately 65 mA to maintain safe junction temperature.

Can BCR133E6433HTMA1 be used with 3.3 V microcontroller GPIO outputs?

Yes - its input on voltage (V_i(on)) is specified from 1.0 V to 2.5 V at I_C = 2 mA, ensuring reliable turn-on with standard 3.3 V CMOS logic. The integrated 10 kΩ base resistor provides appropriate bias current without external components.

Is there a recommended PCB layout for thermal performance?

Yes - use minimum 10 mm² copper pour connected to Pin 2 (Emitter) as a thermal pad, with ≥2 thermal vias to inner ground plane. Keep traces short between collector and load, and avoid placing heat-generating components within 2 mm of the SOT23 body to maintain R_thJS ≤ 240 K/W.

Does BCR133E6433HTMA1 support PWM switching at frequencies above 1 MHz?

No - while f_T = 130 MHz indicates high-frequency capability, practical PWM switching is limited to ≤10 MHz due to stored charge and minority carrier lifetime. For >1 MHz operation, verify V_CE rise/fall times (typically 25 ns/35 ns) and ensure gate drive strength meets I_B = I_C/20 requirement.