Reference sheet in PDF for the IRFP32N50K MOSFET, which the name rates at 500 V and 32 A. Filed as a schematic, the 97.7 KB document is presumably the manufacturer datasheet with ratings, on-resistance, switching data and the package outline. High-voltage parts like this appear in power factor correction stages, welders and offline supplies, so the sheet helps confirm a correct substitute and pinout. Always compare drain voltage, current and gate charge before swapping in a different device, and inspect the driver circuit after a failure.
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.