PNP small-signal transistor for general-purpose switching and amplification
The Infineon BC80716E6327 is a PNP bipolar junction transistor in the standard SOT-23-3 surface-mount package (PG-SOT23-3-11). The 200 MHz transition frequency makes it suitable for moderate-speed switching and linear amplification up to low-VHF frequencies.
Vce(sat) is specified at 700 mV maximum with a base current of 50 mA driving a collector current of 500 mA. That saturation voltage is the key loss term in a low-side switch: at full rated current the transistor drops about 0.7 V, so the power dissipated in saturation is roughly 350 mW — right at the package limit, meaning a switch running at 500 mA needs good PCB copper to keep the junction below 150 °C.
