This part is a kind of semiconductor called 2SD970.

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 2SD970 DESCRIPTION ·With TO-220 package ·High DC current gain ·DARLINGTON ·Complement to type 2SB791 APPLICATIONS ·For medium speed and power switching applications PINNING PIN 1 2 3 DESCRIPTION Base Collector;connected to mounting base Emitter Absolute maximum ratings(Ta=25 ) SYMBOL VCBO VCEO VEBO IC ICM PC Tj Tstg PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Collector current-peak Collector dissipation Junction temperature Storage temperature TC=25 Open emitter Open base Open collector CONDITIONS VALUE 120 120 7 8 12 40 150 -55~150 UNIT V V V A A W SavantIC Semiconductor Product Specification Silicon NPN Power Transistors CHARAC [ ... ]

2SD970 PDF Datasheet Download