The MPS6520 from Central Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 4 V, Collector Base Voltage 40 V, Collector Cut off Current 1 µA, Collector Emitter Breakdown Voltage 25 V, Collector Emitter Voltage 25 V. Tags: Through Hole, NPN Transistor. More details for MPS6520 can be seen below.