The MPSA44BK from Diotec Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 6 V, Base Emitter Saturation Voltage 750 mV, Emitter Cut off Current 100 nA, Collector Base Voltage 500 V, Collector Cut off Current 100 nA. Tags: Through Hole, NPN Transistor. More details for MPSA44BK can be seen below.