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RATED voltage is the voltage on the nameplate - the "design point" for maximum power throughput and safe thermal operation.

Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.

Current rating is the maximum current that a fuse will carry for an indefinite period without too much deterioration of the fuse element.

RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.