This part is a kind of semiconductor called 2SA490.

Function of this product has Silicon POwer Transistors.

Manufacturers : SavantIC

Image and pinout :

Some of the text within the PDF file :

SavantIC Semiconductor Product Specification Silicon PNP Power Transistors 2SA490 DESCRIPTION ·With TO-220 package ·Complement to type 2SC790 APPLICATIONS ·For power amplifier 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 VCBO VCEO VEBO IC IE PC Tj Tstg PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Emitter current Collector power dissipation Junction temperature Storage temperature TC=25 CONDITIONS Open emitter Open base Open collector VALUE -50 -40 -5 -3 3 25 150 -55~150 UNIT V V V A A W SavantIC Semiconductor Product Specification Silicon PNP Power Transist [ ... ]

2SA490 PDF Datasheet Download