This part is a kind of semiconductor called BD709.

Function of this product has (BD707 - BD711) SILICON POWER TRANSISTOR.

Manufacturers : SavantIC

Image and pinout :

Some of the text within the PDF file :

SavantIC Semiconductor Product Specification Silicon NPN Power Transistors DESCRIPTION ·With TO-220C package ·The BD707 and BD711are respectively complement to type BD708 and BD712 APPLICATIONS ·Intented for use in power linear and switching applications. PINNING PIN 1 2 3 Base Collector;connected to mounting base Emitter DESCRIPTION BD707 BD709 BD711 Absolute maximum ratings(Ta=25 ) SYMBOL PARAMETER BD707 VCBO Collector-base voltage BD709 BD711 BD707 VCEO Collector-emitter voltage BD709 BD711 VEBO IC ICM IB PT Tj Tstg Emitter-base voltage Collector current-DC Collector current-Pulse Base current Total dissipation Junction temperature Storage temperature TC=25 Open collector Open base Open emitter CONDITIONS VALUE 60 80 100 60 80 100 5 12 18 5 75 150 -65~150 V A [ ... ]

BD709 PDF Datasheet Download