Reference archive of SMD codes, the short markings printed on small surface-mount parts such as transistors, diodes and regulators. Technicians use such tables to identify an unknown SOT-23 or similar package from its marking and find a substitute part. The 9.08 MB zip probably holds documents or a lookup database. One code can map to several parts from different makers, so check package type and pinout before replacing.
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 @azvoltagemap. Enginerys does not host this file.
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