The PZT3904 from Lision Technology is a Bipolar Junction Transistor with Emitter Base Voltage 6 V, Collector Base Voltage 60 V, Collector Emitter Breakdown Voltage 40 V, Collector Emitter Voltage 40 V, Continuous Collector Current 200 mA. Tags: Surface Mount, NPN Transistor. More details for PZT3904 can be seen below.