Part datasheet in PDF form for the 2SK1727, about 86 KB. Its 2SK prefix marks an N-channel FET under the Japanese transistor naming system; manufacturer, package and ratings are not in the file name and must be read inside. Useful when a power or switching circuit has a shorted transistor: the sheet shows the pinout for in-circuit checks and the drain-source voltage, current and on-resistance figures needed to select a compatible replacement that fits the same footprint.
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.