The TTD1415B from Toshiba is a Bipolar Junction Transistor with Emitter Base Voltage 6 V, Base Emitter Saturation Voltage 1.5 to 2 V, Emitter Cut off Current 3 mA, Collector Base Voltage 120 V, Collector Cut off Current 2 µA. Tags: Through Hole, NPN Transistor. More details for TTD1415B can be seen below.