This part is a kind of semiconductor called 2SD402.

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 2SD402 DESCRIPTION ·With TO-220C package ·Complement to type 2SB547 ·High breakdown voltage APPLICATIONS ·Designed for use in line-operated color TV vertical deflection of complementary symmetry circuit PINNING PIN 1 2 3 Base Collector;connected to mounting base Emitter DESCRIPTION Absolute maximum ratings(Ta=25 ) SYMBOL VCBO VCEO VEBO IC ICM IB PC Tj Tstg PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Collector current-Peak Base current Collector dissipation Junction temperature Storage temperature TC=25 Open emitter Open base Open collector CONDITIONS VALUE 200 150 5 2.0 3.0 1.5 20 150 -50~150 UNIT V V V A A A W THERMAL CHARACTERISTI [ ... ]

2SD402 PDF Datasheet Download