This part is a kind of semiconductor called 2SD2340.

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 2SD2340 DESCRIPTION ·With TO-3PN package ·DARLINGTON ·High DC current gain APPLICATIONS ·Audio ,regulator and general purpose PINNING PIN 1 2 3 Base Collector;connected to mounting base Emitter Fig.1 simplified outline (TO-3PN) and symbol DESCRIPTION Absolute maximum ratings(Ta= ) SYMBOL VCBO VCEO VEBO IC PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current TC=25 PC Collector power dissipation Ta=25 Tj Tstg Junction temperature Storage temperature 2.5 150 -55~150 CONDITIONS Open emitter Open base Open collector VALUE 130 110 5 6 50 W UNIT V V V A SavantIC Semiconductor Product Specification Silicon NPN Power Transistors CHARACTERISTICS Tj= [ ... ]

2SD2340 PDF Datasheet Download