A 755 KB PDF bearing only the part code 2N5484 and grouped with schematics. Matching sizes with the 2N5485 and 2N5486 files hint at a common datasheet for the whole family, though that remains an inference. As a JEDEC discrete part number, the content should cover leads, package and electrical limits rather than a board circuit. A technician uses it to check orientation and select the correct grade when replacing. Read the marking on the original component, since neighbouring numbers are not interchangeable without checking.
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.