The 2N2158 from New Jersey Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 40 V, Collector Base Voltage 75 V, Collector Emitter Voltage 60 V, Continuous Collector Current 30 A, Power Dissipation 170 W. Tags: Through Hole, PNP Transistor. More details for 2N2158 can be seen below.