The TTC1949 from Toshiba is a Bipolar Junction Transistor with Emitter Base Voltage 5 V, Emitter Cut off Current 100 nA, Collector Base Voltage 50 V, Collector Cut off Current 100 nA, Collector Emitter Voltage 50V. Tags: Surface Mount, NPN Transistor. More details for TTC1949 can be seen below.