The CMBT3904ETR from Central Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 6 V, Base Emitter Saturation Voltage 0.65 to 0.85 V, Collector Base Voltage 60 V, Collector Cut off Current 50 nA, Collector Emitter Breakdown Voltage 60 V. Tags: Surface Mount, NPN Transistor. More details for CMBT3904ETR can be seen below.