Small 44.2 KB PDF for the 2SC5541, filed as a schematic though the part code points to an NPN bipolar transistor under the Japanese JIS system. Expect a concise datasheet with absolute maximum ratings, electrical characteristics and an outline drawing with pin numbering. The name holds no further detail on package or source. Use it to confirm which leg is collector before measuring or reinstalling, and to screen substitutes by voltage, current and frequency figures. Match the body marking before relying on it.
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.