Pre-biased NPN — integrated resistors simplify the BOM
The BCR141E6327HTSA1 is an NPN pre-biased transistor from Infineon, integrating two 22 kOhm resistors — one in series with the base (R1) and one between base and emitter (R2). This eliminates two external passives per switching node, shrinking the PCB footprint and reducing pick-and-place cost. Rated for 50 V collector-emitter breakdown and 100 mA continuous collector current, it suits low-side switching in 5 V to 24 V logic-level loads — relay coils, indicator LEDs, small solenoids.
Last Buy — plan your final order
Infineon has placed the BCR141E6327HTSA1 in Last Buy status. This means the manufacturer has announced end-of-life; remaining production windows and distributor inventory are finite. Once the last-time-buy window closes, the part will no longer be manufactured. For production lines that already qualify this transistor, securing a final lot against the BOM quantity is the immediate priority.
SOT-23 footprint and thermal budget
Packaged in a standard SOT-23-3 (PG-SOT23), the device lands on a 0.95 mm pin pitch footprint common across small-signal transistors. Maximum power dissipation is 250 mW; the thermal limit is set by the copper pad area on the PCB, not the package itself.