The MMDT3904-TP from Micro Commercial Components is a Bipolar Junction Transistor with Emitter Base Voltage 6 V, Base Emitter Saturation Voltage 0.65 to 0.95 V, Emitter Cut off Current 50 nA, Collector Base Voltage 60 V, Collector Cut off Current 50 nA. Tags: Surface Mount, NPN Transistor. More details for MMDT3904-TP can be seen below.