Datasheet PDF of 114 KB for the 2SK2616, a part named under the Japanese JIS scheme for N-channel field-effect transistors. The file should hold the essential rating tables, typical characteristics and the package outline showing gate, drain and source. It is handy for verifying pins during in-circuit or out-of-circuit testing and for matching specifications when the exact part is hard to source. Compare the package and the printed marking with the original before soldering a substitute.
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.