Small datasheet in PDF format named only with the number 72290, which does not reveal the component or maker, so the first page must be checked to identify it. A component datasheet supplies pin assignments, ratings and electrical tables used to test a part in circuit or select a substitute. Any PDF viewer will open it. Since a bare number can match several unrelated parts, compare the package and marking on the actual chip with the document before using its values for diagnosis or 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 @ic_mosfet_pdf_datasheets. 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.