This part is a kind of semiconductor called 2SD1275.

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 2SD1275 2SD1275A DESCRIPTION ·With TO-220Fa package ·Complement to type 2SB949/949A ·High DC current gain ·High-speed switching APPLICATIONS ·For power amplification PINNING PIN 1 2 3 DESCRIPTION Base Collector Emitter Fig.1 simplified outline (TO-220Fa) and symbol Absolute maximum ratings (Ta=25 ) SYMBOL PARAMETER 2SD1275 VCBO Collector-base voltage 2SD1275A Collector-emitter voltage Emitter-base voltage Collector current Collector current-Peak TC=25 PC Collector power dissipation Ta=25 Tj Tstg Junction temperature Storage temperature 2 150 -55~150 2SD1275 Open base 2SD1275A Open collector 80 5 2 4 35 W V A A Open emitter 80 60 V CONDITIONS VALUE 60 V UNIT VCEO VEBO IC ICM SavantIC [ ... ]

2SD1275 PDF Datasheet Download