Automotive-grade pre-biased PNP for switched loads
The Infineon BCR169WE6327 is a PNP pre-biased transistor in the SC-70 (SOT-323) surface-mount package, qualified to AEC-Q101 for automotive applications. It integrates a 4.7 kOhms base resistor, simplifying the drive circuit by eliminating an external resistor. With a collector-emitter breakdown voltage of 50 V and a continuous collector current rating of 100 mA, it suits low-side switched loads in automotive body electronics, sensor interfaces, and relay or lamp drivers.
Switching performance and drive margin
A transition frequency of 200 MHz supports switching into the low-MHz range for PWM dimming or solenoid drive. The 300 mV saturation voltage at 500 µA base and 10 mA collector current keeps conduction losses low in lightly loaded outputs.
Package and footprint
Housed in the PG-SOT323-3-1 package (SC-70, 3-lead), the BCR169WE6327 occupies minimal board area. The surface-mount body suits automated assembly and reflow soldering. Maximum power dissipation is 250 mW, so thermal derating should be considered when driving continuous currents near the 100 mA limit at elevated ambient temperatures.
Sourcing and lifecycle
For dual-sourcing or cross-reference needs, Infineon offers several pre-biased PNP transistors in the same SC-70 package family with different base resistor values — the 4.7 kOhms R1 value is specific to this ordering code.