The BC849BW from Diotec Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 5 V, Emitter Cut off Current 100 nA, Collector Base Voltage 30 V, Collector Cut off Current 5 µA, Collector Emitter Voltage 30 V. Tags: Surface Mount, NPN Transistor. More details for BC849BW can be seen below.