Datasheet for the 1N5405, a 500 V, 3 A silicon rectifier from the 1N5400 series, provided as a 43.4 KB PDF and indexed under schematics. The name has no maker or revision details. It lists reverse voltage, forward current, surge capability and package dimensions. A technician checking a failed rectifier in a supply section can use it to confirm ratings and pick an equivalent or higher grade. Open in any PDF reader and note the cathode band orientation printed on the part.
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.