Reference sheet for the 2SK1529, a part number that follows the Japanese 2SK scheme used for N-channel FETs. The index lists it as a schematic, but at 288 KB and named only by the device code it is almost certainly a component datasheet. Expect absolute maximum ratings, electrical characteristics, pin assignment and a package drawing. Use it to identify gate, drain and source before measuring with a meter, and to compare specifications when picking an equivalent replacement. Opens in any standard PDF viewer.
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.