The 2SC3441D from Isahaya Electronics is a Bipolar Junction Transistor with Emitter Base Voltage 4 V, Emitter Cut off Current 0.5 µA, Collector Base Voltage 55 V, Collector Cut off Current 0.5 µA, Collector Emitter Breakdown Voltage 50 V. Tags: Surface Mount, NPN Transistor. More details for 2SC3441D can be seen below.