Fuse breaking capacity is a safety index, not what relationship with the electrical performance of it, it is easy to be ignored by the manufacturer or user, even some people don‘t know the fuse and the breaking capacity of such a technical index.
Fuse as a security element, need any time to ensure safety and other parts of circuit in the circuit, so the first to have to guarantee itself in any case is safe enough, especially not any unsafe factors in the course of action of the fuse, these factors include continuous arcing, guide again pass, combustion, explosion and splash. Breaking capacity is one of the indicators reflecting the ability of the fuse.
The parameters of unit breaking capacity is the ampere, its meaning is to fuse the maximum current safely breaking circuit, that is to say: as long as the circuit in the current does not exceed the fuse breaking capacity, ensure the safety of the fuse can cut off the current, any unsafe phenomenon; and although the fuse can cut off current, but not necessarily to ensure absolute safety, so breaking capacity is not a not essential index.
In order to ensure the safety of the fuse, we choose in the fuse, in addition to considering the current capacity, fuse characteristics, anti pulse ability and aging speed, impedance and power consumption, temperature reduction and other necessary performance parameters, but also need to consider the safety index of breaking capacity, rated voltage and safety certification.
Small European spec tubular fuse, fuse the same shape and the same size and low fuses and fuse high points, low fuse breaking capacity for 10 times the rated current of 35 Amperes or larger, selected from both.
High breaking capacity of the fuse is as high as 1500 amp; and the North American specification tubular fuse breaking varieties have the level of division, it stipulates the breaking capacity of the index is much higher; under the condition of 125V 10000 amp, and under the condition of 250V 35-1500 AMP (as the fuse rated current specifications). The surface mount chip fuse breaking capacity is often in the 50 amps up and down.