The KTC5103D-YU from KEC Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 7 V, Base Emitter Saturation Voltage 0.9 to 1.2 V, Emitter Cut off Current 10 µA, Collector Base Voltage 60 V, Collector Cut off Current 10 µA. Tags: Surface Mount, NPN Transistor. More details for KTC5103D-YU can be seen below.