The 2SK1413 is documented in this 112 KB PDF, listed under schematics but named after a single discrete part, which points to a datasheet. JIS semiconductor naming assigns the 2SK prefix to N-channel FETs. No other specifics, such as case or ratings, can be taken from the name. Consult it for terminal layout, breakdown voltage, drain current and gate threshold, and confirm the printed marking on the component before using the figures for diagnosis or substitution.
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.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.