Listed under schematics, this 56.0 KB PDF carries only the short code 63cnq, without a full suffix, brand, model or board revision. It probably covers a component series rather than one specific part, given the truncated code. The small size points to a brief reference sheet. Open it in any PDF viewer to read pinout and ratings. When matching it to hardware, read the complete marking on the component, since the missing suffix in the name may hide several voltage or current grades.
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.