This part is a kind of semiconductor called 2SD2101.

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 2SD2101 DESCRIPTION ·With TO-220Fa package ·DARLINGTON APPLICATIONS ·Low frequency power amplifier PINNING PIN 1 2 3 Base Collector Emitter Fig.1 simplified outline (TO-220Fa) and symbol DESCRIPTION Absolute maximum ratings(Ta=25 ) SYMBOL VCBO VCEO VEBO IC ICP PARAMETER Collector-base voltage Collector -emitter voltage Emitter-base voltage Collector current Collector current peak TC=25 PC Collector power dissipation Ta=25 Tj Tstg Junction temperature Storage temperature 2 150 -55~150 CONDITIONS Open emitter Open base Open collector VALUE 200 200 7 10 15 30 W UNIT V V V A A SavantIC Semiconductor Product Specification Silicon NPN Power Transistors 2SD2101 CHARACTERISTICS www.datashee [ ... ]

2SD2101 PDF Datasheet Download