Datasheet-style PDF for part 2SK303, about 101 KB, listed in the schematic category. In JIS semiconductor naming, 2SK designates N-channel field-effect transistors. The name states no manufacturer, revision or package, so read those details from the document itself. Typical uses include identifying gate, drain and source legs, checking maximum voltage and dissipation, and selecting a cross-reference part. Always compare the body marking and any suffix letter on the board component with what the sheet covers.
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.