Only the code 50WQ03FN appears in the name of this 128 KB PDF, catalogued as a schematic with no device, brand or board revision. It appears to be a component part number from the 50WQ group and represents yet another voltage grade, so the file most likely holds a datasheet. Open it with any PDF reader to look up maximum ratings, characteristic curves and the package drawing. Before replacing a part on its basis, compare the marking on the original component with the document title.
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.