company news about What is the relationship between the rated current of a fuse and the protective current?

        The rated current of a fuse refers to the current of an electrical device operating at rated voltage and at rated power. The rated current of electrical equipment refers to the allowable current for long-term continuous operation of electrical equipment under rated environmental conditions (ambient temperature, sunlight, altitude, installation conditions, etc.). When working with an electrical appliance, the current should not exceed its rated current.

        Fusing current Unit: mA, A, etc. The maximum current that the guide wire can pass when it is blown. However, as the resistance of the wire increases, its fusing current will also decrease. When the cross-sectional area of a wire is fixed, the longer the length, the greater the resistance, and the smaller the fusing current.

        In general, the rated current of the same fuse is smaller than the fusing current. The rated current refers to the maximum current of the circuit in which the fuse is located. For example, if the maximum allowable current in a circuit is 10A, the rated current of a suitable fuse is 10A. The fusing current refers to the fact that when the current flowing through the fuse exceeds this current value, the fuse will blow, thereby protecting the circuit.

        Rated current and fusing current are not a concept and cannot be equated. "It should only be considered as a nominal specification. However, the level of current flowing through the fuse and when it will blow are specified in detail in the fuse product standards, which vary depending on the standards.". A fuse has a "fusing factor" with a value greater than "1" (typically between 1.1 and 1.5), which is the ratio of "normal non fusing current" to "rated current". From this, it can be seen that even if the current flowing through the fuse is greater than its rated current and does not exceed the conventional non fusing current, the fuse should not blow.