This part is a kind of semiconductor called BDW47.

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 PNP Power Transistors BDW47 DESCRIPTION ·With TO-220C package ·Complement to type BDW42 ·DARLINGTON ·High DC current gain ·Low collector saturation voltage APPLICATIONS ·For general purpose and low speed switching applications PINNING PIN 1 2 3 Base Collector;connected to mounting base Emitter DESCRIPTION Absolute maximum ratings(Ta=25 ) SYMBOL VCBO VCEO VEBO IC IB PD Tj Tstg PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current-DC Base current Total power dissipation Junction temperature Storage temperature TC=25 Open emitter Open base Open collector CONDITIONS VALUE -100 -100 -5 -15 -0.5 85 150 -55~150 UNIT V V V A A W THERMAL CHARACTERISTICS SYMBOL Rth j-C PA [ ... ]

BDW47 PDF Datasheet Download