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UL 248 and IEC 60127 are two major fuse standards for fuses. These two standards are mutually rejection and do not swap directly. Traditionally, UL 248 is a security standard for fuses used in North America. IEC 60127 is a security standard for fuses that are destined to use internationally.
According to the IEC 60127 fuse, it can run at 100 % at a rate of 100 % at a rate of 100 %, and the fuse of the UL 248 can only run continuously when the rated current value is 75 %. The UL 248 fuse is opened with a current of 135 %, and the IEC 60127 fuse fuse is tested to carry 150 % current.