Named after part 2N5485, this 755 KB PDF has no board, device or revision details. It shares its size with the 2N5484 and 2N5486 entries, so it is likely the same family datasheet, although the name does not say so outright. The JEDEC 2N code marks a discrete semiconductor, and the sheet should give pinout, package outline and parameter tables. Use it when identifying leads or picking a replacement grade, and confirm the marking on the part, as the variants differ in specified 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 @cyberlanelectonik. Enginerys does not host this file.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.