The 2SC4131 from Sanken Electric is a Bipolar Junction Transistor with Emitter Base Voltage 15 V, Base Emitter Saturation Voltage 1.2 V, Emitter Cut off Current 10 µA, Collector Base Voltage 100 V, Collector Cut off Current 10 µA. Tags: Through Hole, NPN Transistor. More details for 2SC4131 can be seen below.