This part is a kind of semiconductor called 2SC4427.

Function of this product has NPN Triple Diffused Planar Silicon Transistor.

Manufacturers : Sanyo Semicon Device

Image and pinout :

Some of the text within the PDF file :

Ordering number:EN2850 NPN Triple Diffused Planar Silicon Transistor 2SC4427 800V/4.5A Switching Regulator Applications Features · High breakdown voltage, high reliability. · Fast switching speed (tf : 0.1µs typ). · Wide ASO. · Adoption of MBIT process. · Micaless package facilitating easy mounting. Package Dimensions unit:mm 2039D [2SC4427] 16.0 3.4 5.6 3.1 5.0 8.0 22.0 2.0 21.0 4.0 2.8 2.0 1.0 123 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 Symbol VCBO VCEO VEBO IC ICP IB PC Junction Temperature Storage Temperature Tj Tstg Conditions PW≤300µs, duty cycle≤10% Tc=25˚C 5.45 5.45 3.5 [ ... ]

2SC4427 PDF Datasheet Download