A 41 KB PDF covering the part coded 5HN02SP, listed with schematics but naming only a component. SP is most likely the package designation in the 5HN02 series. Expect a datasheet with pin functions, ratings, curves and a package outline. It is useful when locating a failed small device in a power or signal switching path and needing to confirm its polarity and limits before replacing it. Make sure the replacement has the same pin order, since packages in one family can map pins differently.
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.