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glass fuse holder supplier.Terminology for the characteristics of ordinary fuses

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2023-11

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　　1. Rated current: The rated working current of the fuse tube (the maximum current of the fuse that can maintain normal operation for a long time under normal circumstances).

　　2. Rated voltage: The rated working voltage of a fuse (the maximum voltage that can be safely withstood when the fuse is disconnected). When selecting a fuse, the rated voltage of the selected fuse should be greater than the input voltage of the protective circuit.

　　3. Breaking capacity: When a large overload current (such as a strong short circuit) occurs in a circuit, the fuse can safely cut off the maximum current of the circuit. It is an important safety indicator for fuses. Safe disconnection refers to the absence of phenomena such as splashing, combustion, explosion, etc. that endanger surrounding components, components, and even personal safety in a circuit breaker.

　　4. Overload capacity (carrying capacity): The maximum overload current that a fuse can maintain operation for a specified period of time. When the current flowing through the fuse exceeds the rated current, the melt temperature will gradually increase and eventually melt after a period of time.

　　The UL standard stipulates that the working time of the fuse exceeds 4 hours, and the maximum non fusing current is 110 [%] (for micro fuse tubes, it is 100 [%]).

　　The IEC standard stipulates that the maintenance time of the fuse exceeds 1 hour, and the maximum non fuse current is 150% of the rated current.

　　5. Fuse characteristics (I-T): The relationship between load current and fuse fuse fuse fuse time.

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