This part is a kind of semiconductor called 2SC4427.

Function of this product has SILICON POWER TRANSISTOR.

Manufacturers : SavantIC

Image and pinout :

Some of the text within the PDF file :

SavantIC Semiconductor Product Specification Silicon NPN Power Transistors 2SC4427 DESCRIPTION ·With TO-3PML package ·High breakdown voltage, high reliability. ·Fast switching speed. ·Wide area of safe operation APPLICATIONS ·For switching regulator applications PINNING PIN 1 2 3 Base Collector Fig.1 simplified outline (TO-3PML) and symbol Emitter DESCRIPTION Absolute maximum ratings(Ta=25 ) SYMBOL VCBO VCEO VEBO IC ICM IB PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Collector current-peak Base current TC=25 PC Collector power dissipation Ta=25 Tj Tstg Junction temperature Storage temperature 3 150 -55~150 PW 300µs, duty cycle 10% Open emitter Open base Open collector CONDITIONS VALUE 1100 800 7 4.5 15 2 5 [ ... ]

2SC4427 PDF Datasheet Download