Infineon Technologies BCR148E6433HTMA1

Overview

BCR148E6433HTMA1 from Infineon Technologies is an NPN silicon digital transistor with integrated bias resistors (R1 = R2 = 47 kΩ), designed for switching, inverting, and interface driver functions in automotive and industrial control 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.

For engineers reviewing the BCR148E6433HTMA1 datasheet, BCR148E6433HTMA1 pinout, BCR148E6433HTMA1 application, or BCR148E6433HTMA1 equivalent, this part serves as a compact, AEC-Q101-qualified logic-level switch with built-in resistor network-ideal for microcontroller GPIO interfacing, LED load control, and level translation in space-constrained PCBs.

Technical Context

This digital transistor integrates two matched resistors (R1, R2) to form a single-bias network enabling direct logic-level drive without external components. Its common-emitter configuration delivers predictable saturation behavior (V_CE(sat) ≤ 0.3 V at I_C = 10 mA, I_B = 0.5 mA) and stable DC current gain (h_FE ≥ 70 at I_C = 5 mA, V_CE = 5 V).

The device uses a SOT23 package with standardized 3-pin layout (Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector), optimized for thermal dissipation (R_thJS ≤ 240 K/W) and qualified per AEC-Q101 for automotive reliability under −40 °C to +125 °C ambient operation.

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package (3-pin, standard footprint per JEDEC TO-236AB), 1.3 mm × 2.9 mm × 1.15 mm body, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC847B and NSVD120DP033T1G, BCR148E6433HTMA1 offers optimal balance of AEC-Q101 compliance, compact SOT23 size, and guaranteed R1/R2 matching-making it preferred for cost-sensitive, high-volume automotive body electronics where layout simplicity and qualification traceability are essential.

Availability

BCR148E6433HTMA1 is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC input buffers, LED indicator drivers, and IoT node power sequencing requiring stable component supply and long-term lifecycle support.

Supply support for BCR148E6433HTMA1 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.

This part belongs to Infineon's BCR family of digital transistors-designed specifically for replacing discrete BJT + resistor combinations in automotive and industrial interface applications where reliability, space savings, and qualification compliance are mandatory.

FAQ

What is the maximum allowable base drive voltage for BCR148E6433HTMA1?

The absolute maximum input reverse voltage (V_i(rev)) is 10 V, and input forward voltage (V_i(fwd)) is rated at 80 V. However, normal operation uses logic-level drive: Vi(on) is specified between 1–3 V, and Vi(off) ≤ 1.5 V ensures reliable cutoff. Exceeding 5 V at the base risks overstressing the internal R1/R2 network.

Does BCR148E6433HTMA1 support PWM switching at frequencies above 1 MHz?

With f_T ≥ 100 MHz and V_CE(sat) stable up to 125 °C, the device supports clean square-wave switching up to ~10 MHz. At 1 MHz, rise/fall times remain sub-50 ns with proper layout; however, thermal limits (P_tot = 200 mW) require duty-cycle derating above 50% for sustained operation.

Is the SOT23 package of BCR148E6433HTMA1 compatible with standard reflow profiles?

Yes-the SOT23 package is qualified for lead-free reflow per J-STD-020, with peak temperature tolerance up to 260 °C for ≤ 30 seconds. The device's MSL level is 1 (unlimited floor life), and its thermal resistance (R_thJS ≤ 240 K/W) aligns with standard PCB copper pour recommendations for SOT23 thermal pads.

How does the R1/R2 ratio tolerance affect switching consistency across production lots?

The R1/R2 ratio is guaranteed 0.9–1.1 (±10%), ensuring matched turn-on and turn-off thresholds across units. This tight ratio minimizes variation in Vi(on)/Vi(off) spread (<0.7 V total window), which directly improves timing predictability in synchronized multi-channel switching applications such as LED matrix scanning.