The KSA643 from Lision Technology is a Bipolar Junction Transistor with Emitter Base Voltage 5 V, Collector Base Voltage 40 V, Collector Emitter Breakdown Voltage 20 V, Collector Emitter Voltage 20 V, Continuous Collector Current 500 mA. Tags: Through Hole, PNP Transistor. More details for KSA643 can be seen below.