The BTC4083S3 from Cystech Electronics is a Bipolar Junction Transistor with Emitter Base Voltage 3 V, Emitter Cut off Current 0.5 µA, Collector Base Voltage 20 V, Collector Cut off Current 0.5 µA, Collector Emitter Breakdown Voltage 11 V. Tags: Surface Mount, NPN Transistor. More details for BTC4083S3 can be seen below.