PNP pre-biased transistor in SC-70 — 47 kΩ base and emitter resistors
The Infineon BCR198WH6327XTSA1 is a PNP pre-biased transistor in a surface-mount SC-70 (SOT-323) package, integrating two 47 kΩ resistors — one in series with the base (R1) and one between base and emitter (R2). This built-in bias network eliminates two external passives from the BOM, shrinking the footprint for digital switching loads up to 100 mA collector current.
NRND — lifecycle and sourcing for BCR198WH6327XTSA1
This means Infineon is phasing out the part; new designs should not use it, and existing production runs will eventually need a transition.
190 MHz fT and 300 mV saturation — switching performance
With a transition frequency of 190 MHz and a VCE(sat) of 300 mV at 500 µA base current and 10 mA collector current, this transistor handles low-to-mid speed switching tasks in industrial control, consumer electronics, and general-purpose interface circuits. The 50 V collector-emitter breakdown voltage provides adequate headroom for 12 V and 24 V rails.