The BCW66F-TP from Micro Commercial Components is a Bipolar Junction Transistor with Emitter Base Voltage 5 V, Base Emitter Saturation Voltage 2 V, Emitter Cut off Current 20 nA, Collector Base Voltage 75 V, Collector Cut off Current 20 nA. Tags: Surface Mount, NPN Transistor. More details for BCW66F-TP can be seen below.