This part is a kind of semiconductor called A1279.
Function of this product has 2SA1279.
Manufacturers : SavantIC
Image and pinout :

Some of the text within the PDF file :
SavantIC Semiconductor Product Specification Silicon PNP Power Transistors 2SA1279 DESCRIPTION ·With TO-220F package ·Low collector saturation voltage APPLICATIONS ·High current switching applications PINNING PIN 1 2 3 Base Collector Emitter Fig.1 simplified outline (TO-220F) and symbol DESCRIPTION Absolute maximum ratings (Ta=25 ) SYMBOL VCBO VCEO VEBO PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Collector current-peak Collector dissipation Junction temperature Storage temperature TC=25 CONDITIONS Open emitter Open base Open collector VALUE -60 -60 -7 -5 -8 30 150 -55~150 UNIT V V V A A W IC ICM PC Tj Tstg SavantIC Semiconductor Product Specification Silicon PNP [ ... ]
A1279 PDF Datasheet Download
