Pre-biased NPN for space-constrained switching
The Infineon BCR116WH6327XTSA1 is an NPN pre-biased digital transistor in a small SC-70 (SOT-323) surface-mount package. It integrates two bias resistors — a 4.7 kΩ base resistor (R1) and a 47 kΩ emitter-base resistor (R2) — so you can drive it directly from a microcontroller GPIO without adding external resistors. The collector-emitter breakdown is rated at 50 V, and continuous collector current is 100 mA, with a total power dissipation ceiling of 250 mW. Typical applications include low-current relay drivers, LED switching, and level shifting in 5 V or 12 V logic systems.
Bias resistors save board space
With R1 = 4.7 kΩ and R2 = 47 kΩ already on-chip, the BCR116 eliminates two external passives per channel. That matters when you are packing multiple switching stages into a tight layout — the SC-70 footprint is about 2.0 mm × 1.25 mm, and every resistor you remove frees up real estate. The pre-biased topology also guarantees a consistent base drive regardless of the GPIO voltage, as long as the input stays within the transistor's safe operating area.
NRND — plan the transition now
That means it is still available for existing production runs, but the manufacturer intends to phase it out.