Infineon Technologies BCR129WH6327XTSA1

Overview

BCR129WH6327XTSA1 from Infineon Technologies is an NPN silicon digital transistor with integrated bias resistor (R1 = 10 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, h_FE = 120–630, and AEC-Q101 qualification.

For engineers reviewing the BCR129WH6327XTSA1 datasheet, BCR129WH6327XTSA1 pinout, BCR129WH6327XTSA1 application, or BCR129WH6327XTSA1 equivalent, key selection criteria include built-in R1 tolerance (7–13 kΩ), thermal resistance R_thJS ≤ 105 K/W, SOT323 package footprint, and guaranteed operation up to T_j = 150 °C in automotive ambient environments.

Technical Context

This device integrates a single NPN transistor with monolithically embedded base bias resistor network (R1 only), eliminating external component count in simple on/off logic-level translation and low-power load switching. Its fixed R1 value enables predictable turn-on behavior without external bias design, supporting direct microcontroller GPIO interfacing.

The SOT323 package provides enhanced thermal performance over SOT23 variants (R_thJS ≤ 105 K/W vs. ≤ 240 K/W), enabling higher continuous current capability at elevated board temperatures - critical for under-hood automotive modules and space-constrained industrial sensors.

Key Specifications

Pinout & Package

SOT323 package: 3-pin surface-mount plastic case with gull-wing leads, 1.3 mm × 2.13 mm footprint, 0.95 mm height, and JEDEC-compliant land pattern.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC847BW,115 and NSVD129WT1G, BCR129WH6327XTSA1 delivers superior thermal robustness (R_thJS ≤ 105 K/W), guaranteed AEC-Q101 qualification, and true plug-and-play integration - making it optimal for automotive-grade digital switching where reliability and layout efficiency are critical.

Availability

BCR129WH6327XTSA1 is available at Aetrix Electronics and suitable for automotive door modules, industrial sensor interfaces, LED status indicators, and smart actuator control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BCR129WH6327XTSA1 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 aligned to ISO/TS 16949 and IATF 16949.

This part belongs to Infineon's BCR family of digital transistors - engineered specifically for AEC-Q101-compliant, high-reliability switching in automotive body electronics and industrial control nodes where integration, thermal resilience, and qualification rigor are mandatory.

FAQ

What is the maximum continuous collector current for BCR129WH6327XTSA1 at 85 °C board temperature?

At T_S = 85 °C, the device supports I_C = 100 mA continuously, as confirmed by its P_tot = 250 mW rating at T_S ≤ 124 °C and V_CE(sat) ≤ 0.3 V. Derating is not required until T_S exceeds 124 °C, per the thermal curve in datasheet Figure 5.

Does BCR129WH6327XTSA1 have a second integrated resistor (R2) between emitter and ground?

No. BCR129WH6327XTSA1 contains only one monolithic bias resistor (R1) between base and input terminal. It is a single-NPN digital transistor - unlike dual-transistor variants such as BCR129S - and does not include an emitter resistor (R2) or feedback network.

Can this device be used in linear amplification mode?

No. The BCR129WH6327XTSA1 is optimized for saturated switching operation only. Its h_FE specification is defined at V_CE = 5 V and I_C = 5 mA, and its R1 value is selected for digital on/off behavior - not for stable Q-point biasing in analog amplifier configurations.

Is the SOT323 package of BCR129WH6327XTSA1 compatible with standard reflow profiles for lead-free soldering?

Yes. The device is qualified for Pb-free reflow per JEDEC J-STD-020D, with peak temperature up to 260 °C for ≤ 30 seconds. Its MSL level is 1, and the package withstands standard SnAgCu thermal cycles without delamination or parametric shift.