The MMBT2222A from AiT Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 6 V, Base Emitter Saturation Voltage 1.2 to 2 V, Emitter Cut off Current 0.1 µA, Collector Base Voltage 75 V, Collector Cut off Current 0.01 µA. Tags: Surface Mount, NPN Transistor. More details for MMBT2222A can be seen below.