The BDX53D from New Jersey Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 5 V, Base Emitter Saturation Voltage 2.5 V, Collector Base Voltage 80 V, Collector Emitter Voltage 80 V, Continuous Collector Current 8 A. Tags: Through Hole, NPN Transistor. More details for BDX53D can be seen below.