TE Connectivity TSM600-250F-RA-2

The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.

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.

the current at which the device is guaranteed to trip.