The SPT165 from Solid State Devices is a Bipolar Junction Transistor with Emitter Base Voltage 3 V, Collector Base Voltage 45 V, Collector Cut off Current 1 µA, Collector Emitter Breakdown Voltage 45 V, Collector Emitter Voltage 45 V. Tags: Through Hole, NPN Transistor. More details for SPT165 can be seen below.