The SFT6800/59 from Solid State Devices is a Bipolar Junction Transistor with Emitter Base Voltage 10 V, Base Emitter Saturation Voltage 1 V, Emitter Cut off Current 200 nA, Collector Base Voltage 500 V, Collector Cut off Current 200 nA. Tags: Stud Mount, NPN Transistor. More details for SFT6800/59 can be seen below.