PDF of 312 KB for the 2SK2645. The trailing 01mr token is not decoded and may be the manufacturer's internal document code or edition. As a JIS 2SK part, it is an N-channel field-effect transistor, so expect ratings, characteristic curves and package information. Use it to confirm pinout, assess on-resistance and voltage limits, and choose an equivalent when the original is unavailable. Match the part body marking to this number before working from the sheet.
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.