A 414 KB PDF documenting the 2SK2662, a part numbered under the JIS scheme in which 2SK means an N-channel FET. Its size suggests a full datasheet with characteristic graphs, a pinout and mechanical drawings. These sheets are a staple when repairing switching power supplies, motor drivers and similar stages where MOSFETs commonly fail short. Use the ratings to pick a substitute with adequate voltage, current and on-resistance margins. Make sure the package matches the PCB footprint before ordering.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.