Component documentation in PDF for the SPP17N80C3, a high-voltage N-channel MOSFET listed in the name as 800 V and 17 A. Although catalogued as a schematic, the content is a part datasheet, useful when servicing switch-mode supplies, PFC stages and industrial power boards. Use it to compare on-resistance, gate charge, avalanche rating and the TO-220 pinout against any substitute you plan to fit. Confirm the full marking on the failed device first, and test the surrounding driver and snubber parts before powering up again.
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.