The 2SD2142-C from SeCoS Corporation is a Bipolar Junction Transistor with Emitter Base Voltage 12 V, Emitter Cut off Current 0.1 µA, Collector Base Voltage 40 V, Collector Cut off Current 0.1 µA, Collector Emitter Breakdown Voltage 32 V. Tags: Surface Mount, NPN Transistor. More details for 2SD2142-C can be seen below.