This part is a kind of semiconductor called C3040.

Function of this product has 2SC3040.

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 500V) ·Fast switching speed ·Wide ASO Safe Operating Area APPLICATIONS ·400V/8A switching regulator applications PINNING PIN DESCRIPTION 1 Base 2 Collector;connected to mounting base 3 Emitter Product Specification 2SC3040 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 500 400 7 8 16 3 2. [ ... ]

C3040 PDF Datasheet Download