The MJ10004 from New Jersey Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 8 V, Base Emitter Saturation Voltage 2.5 V, Emitter Cut off Current 175 mA, Collector Cut off Current 0.25 to 5 mA, Collector Emitter Voltage 350 V. Tags: Through Hole, NPN Transistor. More details for MJ10004 can be seen below.