The MMBTA44 from KEC Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 6 V, Base Emitter Saturation Voltage 0.75 V, Emitter Cut off Current 100 nA, Collector Base Voltage 450 V, Collector Cut off Current 100 nA. Tags: Surface Mount, NPN Transistor. More details for MMBTA44 can be seen below.