Labelled 80CPTN015, this 70.0 KB PDF is classed as a schematic yet carries a semiconductor part code rather than a board number, resembling International Rectifier Schottky rectifier naming. A datasheet is the likely content, and no device or brand is named. It differs by one letter from the 80CPT015 sheet also listed, so variants should be compared carefully. Use it to verify pinout, package and electrical limits before measuring or replacing the component on a power board.
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.