Reference PDF of 27.6 KB for the component 5HP01S, filed among schematics although it describes one discrete part. The S suffix most likely marks a package variant within the series. Inside you should find pin definitions, maximum ratings and outline drawings rather than circuit pages. It is handy when tracing a fault to a small switching transistor and needing to verify polarity and footprint before replacement. Always compare the code laser-printed on the part with this name, as related variants share specifications but not packages.
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.