The MMSTA42-TP from Micro Commercial Components is a Bipolar Junction Transistor with Emitter Base Voltage 6 V, Base Emitter Saturation Voltage 0.9 V, Emitter Cut off Current 0.1 µA, Collector Base Voltage 300 V, Collector Cut off Current 0.1 µA. Tags: Surface Mount, NPN Transistor. More details for MMSTA42-TP can be seen below.