This part is a kind of semiconductor called D1594.

Function of this product has 2SD1594.

Manufacturers : SavantIC

Image and pinout :

Some of the text within the PDF file :

SavantIC Semiconductor Product Specification Silicon NPN Power Transistors 2SD1594 DESCRIPTION ·With TO-220Fa package ·Low collector saturation voltage APPLICATIONS ·Low frequency power amplifier ·High speed switching industrial use PINNING PIN 1 2 3 DESCRIPTION Base Collector Emitter Fig.1 simplified outline (TO-220Fa) and symbol Absolute maximum ratings(Ta=25 ) SYMBOL VCBO VCEO VEBO IC ICM IB PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current (DC) Collector current-Peak Base current (DC) Ta=25 PC Collector power dissipation TC=25 Tj Tstg Junction temperature Storage temperature 40 150 -55~150 CONDITIONS Open emitter Open base Open collector VALUE 150 100 7 7 15 3.5 1.5 W UNIT V V V A A A SavantIC Semiconductor w [ ... ]

D1594 PDF Datasheet Download