PNP pre-biased with 10 kΩ resistors — the selection note
The Infineon BCR183WH6327XTSA1 is a PNP pre-biased transistor — often called a digital transistor — in a PG-SOT323 package. It integrates two 10 kOhm resistors (R1 base, R2 emitter-base) so you drop the external bias network. Collector-emitter breakdown is rated at 50 V, continuous collector current at 100 mA, and the transition frequency hits 200 MHz.
NRND — plan the BOM transition now
That means Infineon has flagged it for eventual end-of-life, though it remains available for existing production runs through the independent channel.
250 mW power ceiling in a SOT-323
Maximum power dissipation is 250 mW. In a PG-SOT323 package that is a thermal budget you respect — at 100 mA continuous with a VCE(sat) of 300 mV at 10 mA, the die stays cool, but if you push near the 50 V breakdown with any real current, junction temperature climbs fast. This is a signal-level switch, not a power driver. The 100 nA collector cutoff (ICBO) tells you leakage is negligible at 25 °C, which matters for battery-powered wake-up circuits.