The MMDTA42-7-F from Diodes Incorporated is a Bipolar Junction Transistor with Emitter Base Voltage 6 V, Base Emitter Saturation Voltage 0.9 V, Emitter Cut off Current 100 nA, Collector Base Voltage 300 V, Collector Cut off Current 100 nA. Tags: Surface Mount, NPN Transistor. More details for MMDTA42-7-F can be seen below.