What is the BCR129E6327HTSA1?
The Infineon BCR129E6327HTSA1 is an NPN pre-biased transistor with a 10 kOhm base resistor integrated in a PG-SOT23 surface-mount package. It is designed for switching and driver applications where a single external resistor would otherwise be needed, saving board space and BOM count. Rated for 50 V collector-emitter breakdown and 100 mA continuous collector current, with a transition frequency of 150 MHz.
Last Buy — sourcing timeline is closing
This part carries a Last Buy lifecycle status, meaning Infineon has announced end-of-life and final orders are accepted only for a limited period. Buyers should secure their lifetime buy quantity now or qualify a replacement before supply dries up.
The 200 mW maximum power dissipation sets the thermal ceiling for continuous operation — in a dense SMT board with limited airflow, derate accordingly. The 10 kOhm base resistor biases the transistor on with a typical 5 V logic signal, eliminating the external resistor. VCE(sat) of 300 mV at 500 µA base and 10 mA collector ensures low saturation voltage for efficient switching. DC current gain (hFE) of 120 minimum at 5 mA collector current provides consistent drive strength across temperature.