This part is a kind of semiconductor called C4108.

Function of this product has 2SC4108.

Manufacturers : Sanyo Semiconductor

Image and pinout :

Some of the text within the PDF file :

Ordering number:EN2473A NPN Triple Diffused Planar Silicon Transistor 2SC4108 400V/12A Switching Regulator Applications Features · High breakdown voltage and high reliability. · Fast switching speed. · Wide ASO. · Adoption of MBIT process. Package Dimensions unit:mm 2022A [2SC4108] 2.6 3.5 15.6 14.0 3.2 4.8 2.0 1.6 1.3 1.2 15.0 20.0 2.0 20.0 1.4 0.6 1.0 1 0.6 2 3 1.4 Specifications Absolute Maximum Ratings at Ta = 25˚C Parameter Collector-to-Base Voltage Collector-to-Emitter Voltage Emitter-to-Base Voltage Collector Current Collector Current (Pulse) Base Current Collector Dissipation Junction Temperature Storage Temperature Symbol VCBO VCEO VEBO IC ICP IB PC Tc=25˚C PW≤300µs, duty cycle≤10% 5.45 5.45 1 : Base 2 : Collector 3 : Emitter SANYO : [ ... ]

C4108 PDF Datasheet Download