This part is a kind of semiconductor called D1409.
Function of this product has 2SD1409.
Manufacturers : SavantIC
Image and pinout :
Some of the text within the PDF file :
SavantIC Semiconductor Product Specification Silicon NPN Power Transistors 2SD1409 www.datasheet4u.com DESCRIPTION ·With TO-220Fa package ·High DC current gain ·DARLINGTON APPLICATIONS ·Igniter applications ·High volitage switching applications PINNING PIN DE 1 2 3 Base Collector Emitter SCRIPTION Absolute maximum ratings(Ta=25 ) SYMBOL P VCBO VCEO VEBO IC IB ARAMETER 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 http://www.Datasheet4U.com SavantIC Semiconductor Product Specification Silicon NPN Power Transistors 2SD1409 [ ... ]