Covering the 8EWF10S and 8EWF12S, this 152 KB PDF is filed as a schematic but follows the part numbering of an International Rectifier or Vishay rectifier series. The S suffix in such names generally marks a surface-mount package. Inside should be ratings, recovery characteristics, marking and package dimensions. Technicians rely on it to identify a damaged rectifier in a power circuit and choose a compatible substitute with equal or higher voltage rating. Read the full code from the part before matching it here.
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.