The BC858BW from Diotec Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 5 V, Base Emitter Saturation Voltage 700 to 850 mV, Emitter Cut off Current 100 nA, Collector Base Voltage 30 V, Collector Cut off Current 5 µA. Tags: Surface Mount, PNP Transistor. More details for BC858BW can be seen below.