Larger 345 KB PDF for the 2SC5280. The 2SC code denotes an NPN bipolar transistor registered under the JIS scheme, so the file is most likely a detailed datasheet, perhaps with characteristic graphs, rather than a device schematic. Expect absolute maximum ratings, electrical characteristics and package information. It is useful when testing the part, judging thermal limits or finding a cross-reference replacement. Check the marking and package on the real component first.
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.