Series datasheet in PDF form, roughly 109 KB, titled 8GBU series and indexed as a schematic. GBU is a common designation for single-phase bridge rectifiers in an inline package, so the document should list voltage grades, current rating, pin order for AC and DC terminals and mechanical dimensions. Repair technicians use it to check a bridge on the mains side of a power supply and fit a correct replacement. Test each internal diode with a meter in diode mode and confirm the pin order before soldering.
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.