PDF document, 145 KB, for the 2SK2316, a part registered under the JIS system where 2SK indicates an N-channel FET. Although the index lists it as a schematic, it is most probably the transistor datasheet with ratings, electrical characteristics and graphs. The larger size suggests more curves or package drawings than a basic sheet. Technicians use it to judge replacements and verify pinout in power or driver circuits. Confirm the marking and package on the actual device before relying on these specifications.
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.