The BTC1510E3-KA-UB-G from Cystech Electronics is a Bipolar Junction Transistor with Emitter Base Voltage 5 V, Base Emitter Saturation Voltage 2 V, Emitter Cut off Current 2 mA, Collector Base Voltage 150 V, Collector Cut off Current 200 µA. Tags: Through Hole, NPN Transistor. More details for BTC1510E3-KA-UB-G can be seen below.