Code 20ETF-HV is the only information in the name of this 99.5 KB PDF, which is catalogued as a schematic. It gives no brand, model, board number or revision. The HV suffix may mark a high-voltage version within the 20ETF series, but read the document to be sure. Open it in a standard PDF reader. It is useful for confirming maximum ratings and pin order during component-level testing or when looking for a substitute. Check the marking on the actual part before ordering anything.
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.