This part is a kind of semiconductor called 5N60.
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 5N60 ·DESCRIPTION ·Drain Current ID= 5.6A@ TC=25℃ ·Drain Source Voltage : VDSS= 600V(Min) ·Fast Switching Speed ·APPLICATIONS ·AC Adapter, Battery Charge and SMPS ABSOLUTE MAXIMUM RATINGS(TC=25℃) SYMBOL ARAMETER VALUE UNIT VDSS Drain-Source Voltage (VGS=0) 600 V VGS Gate-Source Voltage ±30 V ID Drain Current-continuous@ TC=25℃ 5.6 A ID(puls) Pulse Drain Current 20 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 Thermal Resistance, Junction to Case 1.67 ℃/W Rth j-a Thermal Resistance, Junction to Ambient 62.5 ℃/W isc website [ ... ]
5N60 PDF Datasheet Download
