The Infineon BCR141WH6327 is an NPN pre-biased transistor — a digital transistor with two 22 kΩ resistors (R1 and R2) integrated into the package. This means the base and emitter bias network is already on-chip, so you drop the two external resistors from the BOM. It is rated for 50 V collector-emitter breakdown and 100 mA continuous collector current, with a transition frequency of 130 MHz. Typical use: switching loads in 5 V or 12 V logic-level circuits, relay and solenoid drivers, or as an inverter in industrial control I/O. The SOT-323 (SC-70) footprint is small enough for dense boards and easy to hand-place if needed.
50 V breakdown, 100 mA Ic — what the ratings mean on site
The 50 V VCEO gives you a solid safety margin on 24 V industrial supplies — no need to derate for transients unless you are seeing spikes above 60 V. The 100 mA collector current handles small relays, LEDs, and optocoupler inputs without breaking a sweat. Saturation voltage is 300 mV at 500 µA base and 10 mA collector, so the transistor stays cool in low-duty-cycle switching.
Infineon lists the BCR141WH6327 as Active (current product status). No single-source risk; the pre-biased transistor family has multiple density options if you need to adjust the resistor ratio.