This part is a kind of semiconductor called 2SD1073.

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 2SD1073 DESCRIPTION ·With TO-220 package ·High DC current gain ·DARLINGTON ·Low saturation voltage APPLICATIONS ·Audio power amplifiers ·Relay and solenoid drivers ·Motor controls ·General purpose power amplifiers PINNING PIN 1 2 3 Base Collector;connected to mounting base Emitter DESCRIPTION Absolute maximum ratings (Ta=25 ) SYMBOL VCBO VCEO VEBO IC IB PC Tj Tstg PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current-continuous Base current Collector power dissipation Junction temperature Storage temperature TC=25 Open emitter Open base Open collector CONDITIONS VALUE 300 250 30 4 0.3 60 150 -55~150 UNIT V V V A A W THERMAL CHARACTERISTIC [ ... ]

2SD1073 PDF Datasheet Download