This part is a kind of semiconductor called 2SD1409.

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 2SD1409 DESCRIPTION ·With TO-220Fa package ·High DC current gain ·DARLINGTON APPLICATIONS ·Igniter applications ·High volitage switching applications PINNING PIN 1 2 3 Base Collector Emitter DESCRIPTION Absolute maximum ratings(Ta=25 ) SYMBOL VCBO VCEO VEBO IC IB PARAMETER Collector-base voltage Collector -emitter voltage Emitter-base voltage Collector current Base current TC=25 PC Collector power dissipation Ta=25 Tj Tstg Junction temperature Storage temperature 2.0 150 -55~150 CONDITIONS Open emitter Open base Open collector VALUE 600 400 5 6 1 25 W UNIT V V V A A 1 SavantIC Semiconductor Product Specification Silicon NPN Power Transistors 2SD1409 CHARACTERISTICS www.datasheet4 [ ... ]

2SD1409 PDF Datasheet Download