The BCX53 from Galaxy Century Microelectronics is a Bipolar Junction Transistor with Emitter Base Voltage -5 V, Base Emitter Saturation Voltage -1.2 V, Emitter Cut off Current -100 nA, Collector Base Voltage -100 V, Collector Cut off Current -100 nA. Tags: Surface Mount, PNP Transistor. More details for BCX53 can be seen below.