Datasheet PDF of 81.4 KB named for part 10TTS08, the through-hole counterpart to the separate 10TTS08S file in this set. Its numbering follows International Rectifier conventions, and the content should be ratings tables, characteristic curves and a package drawing rather than a circuit diagram. A technician consults it to understand pin functions, check voltage and current limits and pick a correct substitute, comparing the marking on the failed component with the document.
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.