The BCY59 from Central Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 7 V, Base Emitter Saturation Voltage 0.6 to 1.2 V, Emitter Cut off Current 10 nA, Collector Base Voltage 45 V, Collector Cut off Current 10 µA. Tags: Through Hole, NPN Transistor. More details for BCY59 can be seen below.