Named 35scgq045, this 70.6 KB PDF is grouped with schematics, but the name suggests a discrete component code and carries no device, brand or revision information. Read it as a part reference sheet. Repair work benefits from such documents when you need the pinout to lift and test a suspected shorted part, or when selecting an equivalent with at least the same voltage and current capability. Any PDF reader handles it; check the full marking on your component so the variant matches before ordering a replacement.
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.