The MMBTA06 from Hunan Jingxin Microelectronics is a Bipolar Junction Transistor with Emitter Base Voltage 4 V, Base Emitter Saturation Voltage 0.25 V, Emitter Cut off Current 100 nA, Collector Base Voltage 80 V, Collector Cut off Current 1 µA. Tags: Surface Mount, NPN Transistor. More details for MMBTA06 can be seen below.