This part is a kind of semiconductor called D2059.
Function of this product has 2SD2059.
Manufacturers : SavantIC
Image and pinout :
Some of the text within the PDF file :
SavantIC Semiconductor Product Specification Silicon NPN Power Transistors 2SD2059 DESCRIPTION ·With TO-220F package ·Complement to type 2SB1367 ·Low collector saturation voltage: VCE(SAT)=2.0V(Max) at IC=4A,IB=0.4A ·Collector power dissipation: PC=30W(TC=25 ) APPLICATIONS ·With general purpose applications PINNING PIN 1 2 3 Base Collector Emitter Fig.1 simplified outline (TO-220F) and symbol 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 Base current Collector dissipation Junction temperature Storage temperature TC=25 CONDITIONS Open emitter Open base Open collector VALUE 100 100 5 5 0.5 30 150 -55~150 UNIT V V V A A W Free [ ... ]