This part is a kind of semiconductor called S2000AF.

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 S2000AF DESCRIPTION ·With TO-3P(H)IS package ·High voltage ·Fast switching APPLICATIONS ·Horizontal deflection for color TV PINNING PIN 1 2 3 DESCRIPTION Base Collector Emitter Fig.1 simplified outline (TO-3P(H)IS) and symbol ABSOLUTE MAXIMUM RATINGS (TC=25 ) SYMBOL VCBO VCEO VEBO IC ICM PC Tj Tstg PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Collector current-peak Collector power dissipation Junction temperature Storage temperature TC=25 Open emitter Open base Open collector CONDITIONS VALUE 1500 700 10 8 15 50 150 -55~150 UNIT V V V A A W THERMAL CHARACTERISTICS SYMBOL Rth j-C PARAMETER Thermal resistance from junction to case VALU [ ... ]

S2000AF PDF Datasheet Download