The temperature rise of the fuse refers to the appreciation of the temperature of the fuse at the temperature of 1.1 times (110%) the rated current flowing in the fuse, that is, the measured temperature minus the value of the ambient temperature. The UL standard specifies its upper limit at 75℃. Because the fuse's melt is more sensitive to temperature, under the action of a certain high temperature for a long time, its melting point and impedance will change, which will affect the accuracy of the fuse. This is usually the fuse aging. The aging fuse is very dangerous to use in the circuit, so we should pay attention to the temperature of the fuse when making and using the fuse. In the same way, we should also notice that even after a long period of use, the fuses have not melted, it may have been aging, and it is best to replace it at this time.
