This part is a kind of semiconductor called 2SD234.

Function of this product has Silicon NPN Power Transistors.

Manufacturers : SavantIC

Image and pinout :

Some of the text within the PDF file :

SavantIC Semiconductor Product Specification Silicon NPN Power Transistors 2SD234 DESCRIPTION ·With TO-220 package ·Complement to type 2SB434 APPLICATIONS ·For low frequency power amplifier and 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 PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current CONDITIONS Open emitter Open base Open collector VALUE 60 50 6 3 1.5 PC Collector power dissipation TC=25 Tj Tstg Junction temperature Storage temperature 25 150 -55~150 W UNIT V V V A SavantIC Semiconductor Product Specification Silicon NPN Power Transistors CHARACTERISTICS Tj=25 unless otherwise specified PARAMET [ ... ]

2SD234 PDF Datasheet Download