The SFT5154J from Solid State Devices is a Bipolar Junction Transistor with Emitter Base Voltage 5.5 V, Base Emitter Saturation Voltage 1.45 to 2.2 V, Emitter Cut off Current 1 mA, Collector Base Voltage 100 V, Collector Cut off Current 1 mA. Tags: Through Hole, NPN Transistor. More details for SFT5154J can be seen below.