This part is a kind of semiconductor called 2SA1220.

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 PNP Power Transistors 2SA1220 2SA1220A · DESCRIPTION ·With TO-126 package ·Complement to type 2SC2690/2690A APPLICATIONS ·Audio frequency power amplifier ·High frequency power amplifier PINNING PIN 1 2 3 DESCRIPTION Emitter Collector;connected to mounting base Base Absolute maximum ratings(Ta=25 ) SYMBOL VCBO PARAMETER 2SA1220 Collector-base voltage 2SA1220A 2SA1220 VCEO VEBO IC ICM IB PD Tj Tstg Collector-emitter voltage 2SA1220A Emitter-base voltage Collector current Collector current-peak Base current Ta=25 Total power dissipation TC=25 Junction temperature Storage temperature 20 150 -55 +150 Open collector Open base -160 -5 -1.2 -2.5 -0.3 1.2 W V A A A Open emitter -160 -120 V CONDITIONS VALUE -120 V UNI [ ... ]

2SA1220 PDF Datasheet Download