This part is a kind of semiconductor called 2SC1577.

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 2SC1577 DESCRIPTION ·With TO-3 package ·High voltage ·High speed switching APPLICATIONS ·For switching regulator and general purpose applications PINNING(see Fig.2) PIN 1 2 3 Base Emitter Collector Fig.1 simplified outline (TO-3) and symbol DESCRIPTION Absolute maximum ratings(Ta= ) SYMBOL VCBO VCEO VEBO IC PC Tj Tstg PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Collector power dissipation Junction temperature Storage temperature TC=25 CONDITIONS Open emitter Open base Open collector VALUE 500 400 7 8 80 150 -55~150 UNIT V V V A W SavantIC Semiconductor Product Specification Silicon NPN Power Transistors CHARACTE [ ... ]

2SC1577 PDF Datasheet Download