The BF620 from Lision Technology is a Bipolar Junction Transistor with Emitter Base Voltage 5 V, Collector Base Voltage 300 V, Collector Emitter Breakdown Voltage 300 V, Collector Emitter Voltage 300 V, Continuous Collector Current 50 mA. Tags: Surface Mount, NPN Transistor. More details for BF620 can be seen below.