The 2SC4177-L4 from AiT Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 5 V, Base Emitter Saturation Voltage 1 V, Emitter Cut off Current 100 nA, Collector Base Voltage 60 V, Collector Cut off Current 100 nA. Tags: Surface Mount, NPN Transistor. More details for 2SC4177-L4 can be seen below.