What this PNP pre-biased transistor does on the board
The BCR 151L3 E6327: The Infineon BCR 151L3 is a PNP pre-biased transistor — essentially a PNP switching transistor with two 100 kOhm resistors built into the package: one between base and emitter (R2), one in series with the base (R1).
Collector-emitter breakdown is rated at 50 V, and continuous collector current at 50 mA.
Package and mounting
Housed in the SC-101 (SOT-883) package — a tiny three-lead surface-mount case. The supplier device package is PG-TSLP-3-4, which is Infineon's leadless plastic package variant.
