The BUV47B from MOSPEC SEMICONDUCTOR is a Bipolar Junction Transistor with Emitter Base Voltage 7 V, Base Emitter Saturation Voltage 1.6 V, Emitter Cut off Current 1 mA, Collector Base Voltage 850 V, Collector Cut off Current 150 µA. Tags: Through Hole, NPN Transistor. More details for BUV47B can be seen below.