The BC848B from Yangjie Electronic Technology is a Bipolar Junction Transistor with Emitter Base Voltage 6 V, Base Emitter Saturation Voltage 1.1 V, Emitter Cut off Current 0.1 µA, Collector Base Voltage 30 V, Collector Cut off Current 0.1 µA. Tags: Surface Mount, NPN Transistor. More details for BC848B can be seen below.