The 2SC4381 from Sanken Electric is a Bipolar Junction Transistor with Emitter Base Voltage 6 V, Emitter Cut off Current 10 µA, Collector Base Voltage 150 V, Collector Cut off Current 10 µA, Collector Emitter Breakdown Voltage 150 V. Tags: Through Hole, NPN Transistor. More details for 2SC4381 can be seen below.