This part is a kind of semiconductor called 2SK610.
Function of this product has N-Channel MOSFET Transistor.
Manufacturers : Inchange Semiconductor
Image and pinout :

Some of the text within the PDF file :
INCHANGE Semiconductor isc N-Channel MOSFET Transistor FEATURES ·Drain Current –ID=3A@ TC=25℃ ·Drain Source Voltage- : VDSS= 400V(Min) isc Product Specification 2SK610 DESCRIPTION ·High Voltage. ·High speed power switching. ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER VDSS Drain-Source Voltage VGS Gate-Source Voltage-Continuous ID Drain Current-Continuous PD Total Dissipation @TC=25℃ TJ Max. Operating Junction Temperature Tstg Storage Temperature VALUE UNIT 400 ±20 V V 3A 80 150 -55~150 W ℃ ℃ isc website:www.iscsemi.cn 1 isc & iscsemi is registered trademark PDF pdfFactory Pro www.fineprint.cn INCHANGE Semiconductor isc N-Channel MOSFET Transistor isc Product Specification 2SK610 ELECTRICAL CHARACTERISTICS TC=25℃ unless otherwise specified [ ... ]
2SK610 PDF Datasheet Download
