Short 28.1 KB PDF for the 2SD2627, catalogued as a schematic though it is most likely a brief datasheet. The JIS 2SD prefix identifies an NPN bipolar transistor of the low-frequency class. Even a short sheet usually gives the pinout, absolute maximum ratings and key electrical characteristics needed to test the device or choose an equivalent. Verify the package type and lead order against the footprint, since these can differ across the family.
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.