This part is a kind of semiconductor called 2SD1877.

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 DESCRIPTION ·With TO-3PML package ·High speed ·High breakdown voltage ·High reliability ·Buitl-in damper diode APPLICATIONS ·Color TV horizontal deflection output ·Color display horizontal deflection output PINNING PIN 1 2 3 Base Collector Emitter DESCRIPTION 2SD1877 Fig.1 simplified outline (TO-3PML) 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 CONDITIONS Open emitter Open base Open collector VALUE 1500 800 6 4 12 50 150 -55~150 UNIT V V V A A W 1 SavantIC [ ... ]

2SD1877 PDF Datasheet Download