The BCP55 from onsemi is a Bipolar Junction Transistor with Emitter Base Voltage 5 V, Base Emitter Saturation Voltage 1 V, Emitter Cut off Current 10 µA, Collector Base Voltage 60 V, Collector Cut off Current 10 µA. Tags: Surface Mount, NPN Transistor. More details for BCP55 can be seen below.