This part is a kind of semiconductor called 2N6249.

Function of this product has (2N6249 - 2N6251) Silicon Power Transistor.

Manufacturers : SavantIC

Image and pinout :

Some of the text within the PDF file :

SavantIC Semiconductor Product Specification Silicon NPN Power Transistors 2N6249 2N6250 2N6251 DESCRIPTION ·With TO-3 package ·High voltage,high speed ·Low collector saturation voltage APPLICATIONS ·High voltage inverters ·Switching regulators ·Line operated amplifier PINNING PIN 1 2 3 Base Collector;connected to mounting base Emitter DESCRIPTION Fig.1 simplified outline (TO-3) and symbol Absolute maximum ratings(Ta=25 ) SYMBOL PARAMETER 2N6249 VCBO Collector-base voltage 2N6250 2N6251 2N6249 VCEO Collector-emitter voltage 2N6250 2N6251 VEBO IC ICM IB PT Tj Tstg Emitter-base voltage Collector current Collector current-peak Base current Total power dissipation Junction temperature Storage temperature TC=25 Open collector Open base Open emitter CONDITIONS VAL [ ... ]

2N6249 PDF Datasheet Download