This part is a kind of semiconductor called 3DD207.

Function of this product has Silicon NPN Power Transistors.

Manufacturers : Inchange Semiconductor

Image and pinout :

Some of the text within the PDF file :

Inchange Semiconductor Product Specification Silicon NPN Power Transistors 3DD207 DESCRIPTION ¡¤ With TO-3 package ¡¤ Low collector saturation voltage APPLICATIONS ¡¤ For audio amplifier applications PINNING(see Fig.2) PIN 1 2 3 Base Emitter Collector Fig.1 simplified outline (TO-3) and symbol DESCRIPTION Absolute maximum ratings(Ta=¡æ ) SYMBOL VCBO VCEO VEBO IC PC Tj Tstg 固电 Collector-base voltage 体 导 半 PARAMETER A H C IN Collector current Collector-emitter voltage Emitter-base voltage EM S E NG Open base TC=75¡æ Open emitter D N O IC CONDITIONS R O T UC VALUE 60 60 6 5 50 150 -55~150 UNIT V V V A W ¡æ ¡æ Open collector Collector power dissipation Junction temperature Storage temperature Inchange Semicond [ ... ]

3DD207 PDF Datasheet Download