For the 2SK1609 transistor, this 36.6 KB PDF supplies the component data. Under Japanese JIS/JEITA conventions 2SK identifies an N-channel FET; the name carries no brand, package or version information. Read it to confirm lead order, maximum voltage and current, and on-resistance before replacing a suspected failed device. Verify the original body marking first, since similar numbers in the series can have different ratings and packages.
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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