The KTC4372 from Lision Technology is a Bipolar Junction Transistor with Emitter Base Voltage 5 V, Collector Base Voltage 200 V, Collector Emitter Breakdown Voltage 150 V, Collector Emitter Voltage 150 V, Continuous Collector Current 50 mA. Tags: Surface Mount, NPN Transistor. More details for KTC4372 can be seen below.