This part is a kind of semiconductor called 4N65.

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 4N65 DESCRIPTION ·Drain Current ID= 4A@ TC=25℃ ·Drain Source Voltage- : VDSS= 650V(Min) ·Fast Switching Speed APPLICATIONS Switching applications in power supplies, PWM motor controls, High efficient DC to DC converters and bridge circuits ABSOLUTE MAXIMUM RATINGS(TC=25℃) SYMBOL PARAMETER VALUE UNIT VDSS Drain-Source Voltage (VGS=0) 650 V VGS Gate-Source Voltage ±30 V ID Drain Current-continuous@ TC=25℃ 4 A ID(puls) Pulse Drain Current 16 A Ptot Total Dissipation@TC=25℃ 106 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 Th [ ... ]

4N65 PDF Datasheet Download