This part is a kind of semiconductor called C4419.

Function of this product has 2SC4419.

Manufacturers : SavantIC

Image and pinout :

Some of the text within the PDF file :

SavantIC Semiconductor Product Specification Silicon NPN Power Transistors DESCRIPTION ·With TO-3PN package ·High reliability ·High voltage ,high speed switching APPLICATIONS ·Switching regulators ·Ultrasonic generators ·High frequency inverters ·General purpose power amplifiers PINNING PIN 1 2 3 Base Collector;connected to mounting base Emitter DESCRIPTION 2SC4419 Fig.1 simplified outline (TO-3PN) and symbol Absolute maximum ratings(Ta= ) SYMBOL VCBO VCEO VEBO IC IB PC Tj Tstg PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Base current Collector power dissipation Junction temperature Storage temperature TC=25 Open emitter Open base Open collector CONDITIONS VALUE 900 800 10 6 3 100 150 -55~150 UNIT V V V A [ ... ]

C4419 PDF Datasheet Download