PDF datasheet for the AON7403, an Alpha and Omega Semiconductor part, around 173 KB; the (1) in the name is just a duplicate copy suffix. AON-prefixed devices are MOSFETs often found in load switches and power paths on notebook boards. The sheet supplies the pinout, voltage and current ratings and on-resistance needed to verify a failed part and choose a substitute. Confirm the polarity and package listed in the document match the component you are replacing before soldering in an alternative.
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.