PDF datasheet for the 1N5397 diode, 42.7 KB, catalogued under the schematic type although it describes one component. Part of the 1N539x series, it most likely presents the whole family in a single ratings table, with this name used only for indexing. Useful when identifying a burnt rectifier by its marking, checking forward voltage during diode-mode testing, or selecting a replacement. Read the absolute maximum ratings section carefully and match polarity using the cathode band shown in the outline drawing.
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.