Datasheet-type PDF, 58.1 KB, bearing the part number 2SC4027 and stored under schematics. Under the Japanese JIS scheme the 2SC prefix means an NPN bipolar transistor. Nothing about package, maker or revision is in the name. In practice the sheet is used to read pin assignments and maximum ratings, test the transistor for shorts or opens with a meter, and choose a substitute with matching or higher limits. Confirm the identification against the marking on the part, since abbreviated codes are common.
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.