Generic datasheet in PDF format, 410 KB, with a name that gives no part number, manufacturer or device it covers. Open it in any PDF reader to identify the component. Datasheets of this kind normally list pinouts, absolute maximum ratings, typical application circuits and package markings, which help when checking a suspect IC, confirming supply voltages on a rail or finding a substitute part. Compare the marking on the chip with the document before relying on any values.
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.