This part is a kind of semiconductor called 2SK1331.

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 2SK1331 DESCRIPTION ·Drain Current –ID=15A@ TC=25℃ ·Drain Source Voltage- : VDSS=500V(Min) APPLICATIONS ·Designed for high voltage, high speed power switching ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL ARAMETER VALUE UNIT DSS Drain-Source Voltage (VGS=0) 500 V VGS Gate-Source Voltage ±20 V ID Drain Current-continuous@ TC=25℃ 15 A Ptot Total Dissipation@TC=25℃ 100 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 0.83 35 ℃/W ℃/W isc website：www.iscsemi.cn 1 isc & iscsemi is registered trad [ ... ]

2SK1331 PDF Datasheet Download