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Fuse (fuse), also known as the current fuse or fuse, IEC127 standard defines it as "fuse (fuse - link) body," key parts (fuse) by its resistivity is larger and low melting point of silver made of copper alloy. Will fuse in current abnormally elevated to a certain height and certain heat, its own fuse to cut off the current, so as to protect the safe operation of the circuit.
Current fuse rated voltage
Fuse nominal working voltage, the code is the Un, general fuse standard voltage rating for the 32 v, 60 v, 125 v, 250 v, 300 v, 500 v, 600 v. Fuse can be used under no greater than the rated voltage of the voltage, but generally are not agree to use the circuit voltage is greater than the rated voltage of the circuit fuse.
Current fuse thermal value
The energy needed for the fuse, the code is t, I read A2Sec. It is to make the fuse in 8 ms or a shorter period of time off. The product of the sum of squares of fusing time of the corresponding current, time limited within 8 ms is to make all the heat generated by the fuse is used to fuse to heat dissipation. It's different for each fuse components is a constant, it is one of the fuse itself parameters, determined by the design of fuse.