This part is a kind of semiconductor called 2SC2078.

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 2SC2078 ·Wit DESCRIPTION With TO-220 package ·Low collector saturation voltage APPLICATIONS ·27MHz RF power amplifier applications PINNING PIN 1 2 3 Base Collector;connected to mounting base Emitter DESCRIPTION Absolute maximum ratings (Ta=25 ) SYMBOL VCBO VCEO VEBO IC ICM PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Collector current-peak Ta=25 PC Collector power dissipation TC=25 Tj Tstg Junction temperature Storage temperature 10 150 -55~150 CONDITIONS Open emitter Open base Open collector VALUE 80 75 5 3 5 1.2 W UNIT V V V A A SavantIC Semiconductor Product Specification Silicon NPN Power Transistors CHARACTER [ ... ]

2SC2078 PDF Datasheet Download