The CEN-U51A from Central Semiconductor is a Bipolar Junction Transistor with Collector Base Voltage 50 V, Collector Emitter Breakdown Voltage 40 V, Collector Emitter Voltage 40 V, Continuous Collector Current 1 to 2 A, DC Current Gain 50. Tags: Through Hole, PNP Transistor. More details for CEN-U51A can be seen below.