The BC309 from Lision Technology is a Bipolar Junction Transistor with Emitter Base Voltage 5 V, Collector Base Voltage 30 V, Collector Emitter Breakdown Voltage 25 V, Collector Emitter Voltage 25 V, Continuous Collector Current 100 mA. Tags: Through Hole, PNP Transistor. More details for BC309 can be seen below.