This part is a kind of semiconductor called A958.

Function of this product has 2SA958.

Manufacturers : SavantIC

Image and pinout :

Some of the text within the PDF file :

SavantIC Semiconductor Product Specification Silicon PNP Power Transistors 2SA957 2SA958 DESCRIPTION ·With TO-220 package ·High breakdown voltage ·High power dissipation APPLICATIONS ·For general purpose applications PINNING PIN 1 2 3 DESCRIPTION Emitter Collector;connected to mounting base Base Fig.1 simplified outline (TO-220) and symbol Absolute maximum ratings(Ta=25 ) SYMBOL PARAMETER 2SA957 VCBO Collector-base voltage 2SA958 2SA957 VCEO Collector-emitter voltage 2SA958 VEBO IC IB PT Tj Tstg Emitter-base voltage Collector current Base current Total power dissipation Junction temperature Storage temperature TC=25 Open collector Open base -200 -6 -2.0 -1.0 30 150 -55~150 V A A W Open emitter -200 -150 V CONDITIONS VALUE -150 V UNIT Free Datasheet http://www. [ ... ]

A958 PDF Datasheet Download