The 2N174 from New Jersey Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 10 V, Collector Base Voltage 175 V, Collector Emitter Voltage 80 V, Continuous Collector Current 5 A, Power Dissipation 3 W. Tags: Screw Mount, NPN Transistor. More details for 2N174 can be seen below.