This part is a kind of semiconductor called C3090.

Function of this product has 2SC3090.

Manufacturers : SavantIC

Image and pinout :

Some of the text within the PDF file :

SavantIC Semiconductor Silicon NPN Power Transistors DESCRIPTION ·With TO-3PN package ·High breakdown voltage (VCBO 800V) ·Fast switching speed ·Wide ASO Safe Operating Area APPLICATIONS ·500V/10A Switching Regulator Applications PINNING PIN 1 2 3 DESCRIPTION Base Collector;connected to mounting base Emitter Product Specification 2SC3090 Fig.1 simplified outline (TO-3PN) and symbol Absolute maximum ratings (Ta=25 ) SYMBOL PARAMETER VCBO Collector-base voltage VCEO Collector-emitter voltage VEBO Emitter-base voltage IC Collector current ICM Collector current-peak IB Base current PC Collector power dissipation Tj Junction temperature Tstg Storage temperature CONDITIONS Open emitter Open base Open collector Ta=25 TC=25 VALUE 800 500 7 10 20 4 2.5 [ ... ]

C3090 PDF Datasheet Download