This part is a kind of semiconductor called 2SK1805.
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 isc Product Specification 2SK1805 DESCRIPTION ·Drain Current ID= 7A@ TC=25℃ ·Drain Source Voltage : VDSS= 500V(Min) ·Fast Switching Speed APPLICATIONS ·Chopper regulator and motor drive ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER VALUE UNIT VDSS Drain-Source Voltage (VGS=0) 500 V VGS Gate-Source Voltage ±30 V ID Drain Current-continuous@ TC=25℃ 7 A Ptot Total Dissipation@TC=25℃ 45 W Tj Max. Operating Junction Temperature 150 ℃ Tstg Storage Temperature Range -55~150 ℃ ·THERMAL CHARACTERISTICS SYMBOL PARAMETER MAX UNIT Rth j-c Rth j-a Thermal Resistance, Junction to Case Thermal Resistance, Junction to Ambient 2.77 ℃/W 62.5 ℃/W isc website:www.iscsemi.cn 1 isc & iscsemi is registe [ ... ]
2SK1805 PDF Datasheet Download
