This part is a kind of semiconductor called 2SK556.

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 2SK556 DESCRIPTION ·Drain Current –ID=12A@ TC=25℃ ·Drain Source Voltage- : VDSS=450V(Min) ·Fast Switching Speed APPLICATIONS ·Designed especially for high voltage,high speed applications, such as off-line switching power supplies , UPS,AC and DC motor controls,relay and solenoid drivers. ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL ARAMETER VALUE UNIT VDSS VGS ID Ptot Tj Tstg Drain-Source Voltage (VGS=0) 450 V Gate-Source Voltage ±20 V Drain Current-continuous@ TC=25℃ 12 A Total Dissipation@TC=25℃ 100 W Max. Operating Junction Temperature 150 ℃ Storage Temperature Range -55~150 ℃ isc website：www.iscsemi.cn 1 isc & iscsemi is registered trademark PDF pdfFactory Pro www.fine [ ... ]

2SK556 PDF Datasheet Download