The TIP122 from STMicroelectronics is a Bipolar Junction Transistor with Emitter Cut off Current 2 mA, Collector Base Voltage 100 V, Collector Cut off Current 0.5 mA, Collector Emitter Voltage 100 V, Continuous Collector Current 5 A. Tags: Through Hole, NPN Transistor. More details for TIP122 can be seen below.