This part is a kind of semiconductor called K2003.

Function of this product has 2SK2003-01MR.

Manufacturers : Fuji Electric

Image and pinout :

Some of the text within the PDF file :

2SK2003-01MR N-CHANNEL SILICON POWER MOSFET Features High speed switching Low on-resistance No secondary breakdown Low driving power High voltage VGS=±30V Guarantee Avalanche-proof FUJI POWER MOSFET FAP-IIA SERIES Outline Drawings TO-220F15 Applications Switching regulators UPS DC-DC converters General purpose power amplifier 2.54 3. Source JEDEC EIAJ SC-67 Maximum ratings and characteristics Absolute maximum ratings ( Tc=25°C unless otherwise specified) Item Drain-source voltage Continuous drain current Pulsed drain current Continuous reverse drain current Gate-source peak voltage Max. power dissipation Operating and storage temperature range Symbol V DS ID ID(puls] IDR VGS PD Tch Tstg Rating 600 4 16 4 ±30 40 +150 -55 to +150 Unit V A A A V W °C °C Equiva [ ... ]

K2003 PDF Datasheet Download