The KTC3552T from KEC Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 6 V, Base Emitter Saturation Voltage 0.88 to 1.2 V, Emitter Cut off Current 0.1 µA, Collector Base Voltage 80 V, Collector Cut off Current 0.1 µA. Tags: Surface Mount, NPN Transistor. More details for KTC3552T can be seen below.