The AC857CWQ-7 from Diodes Incorporated is a Bipolar Junction Transistor with Emitter Base Voltage -5 V, Base Emitter Saturation Voltage -700 to -950 mV, Collector Base Voltage -50 V, Collector Cut off Current -4 µA, Collector Emitter Breakdown Voltage -45 V. Tags: Surface Mount, PNP Transistor. More details for AC857CWQ-7 can be seen below.