The 2N3072 from New Jersey Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 4 V, Base Emitter Saturation Voltage 1.2 to 2 V, Emitter Cut off Current 100 µA, Collector Base Voltage 60 V, Collector Cut off Current 10 µA. Tags: Through Hole, NPN Transistor. More details for 2N3072 can be seen below.