This part is a kind of semiconductor called 2SD669.

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 2SD669 2SD669A DESCRIPTION ·With TO-126 package ·Complement to type 2SB649/649A ·High breakdown voltage VCEO:120/160V ·High current 1.5A ·Low saturation voltage,excellent hFE linearity APPLICATIONS ·For low-frequency power amplifier applications PINNING PIN 1 2 3 Emitter Collector;connected to mounting base Base DESCRIPTION Absolute maximum ratings(Ta=25 ) SYMBOL VCBO PARAMETER 2SD669 Collector-base voltage 2SD669A 2SD669 VCEO VEBO IC ICM PD Tj Tstg Collector-emitter voltage 2SD669A Emitter-base voltage Collector current (DC) Collector current-peak Ta=25 Total power dissipation TC=25 Junction temperature Storage temperature 20 150 -55~150 Open collector Open base 160 5 1.5 3 1 W V A A [ ... ]

2SD669 PDF Datasheet Download