The KTC3770V from KEC Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 3 V, Emitter Cut off Current 1 µA, Collector Base Voltage 20 V, Collector Cut off Current 1 µA, Collector Emitter Voltage 12 V. Tags: Surface Mount, NPN Transistor. More details for KTC3770V can be seen below.