The fuse has a lower melting temperature

1. Normal operating current runs at 25°C, and the current rating of the fuse is usually reduced by 25% to avoid harmful fusing. Most traditional fuses use materials that have a lower melting temperature. Therefore, this type of fuse is more sensitive to changes in ambient temperature. For example, a fuse with a current rating of 10A is generally not recommended to operate at a current greater than 7.5A at an ambient temperature of 25°C.

2. Voltage rating The voltage rating of the fuse must be equal to or greater than the effective circuit voltage. The general standard voltage rating series are 32V, 125V, 250V, 600V.

3. The resistance of the resistance fuse is not important in the entire circuit. Since the resistance of a fuse with an amperage of less than 1 is only a few ohms, this issue should be considered when using a fuse in a low-voltage circuit. Most fuses are made of materials with a positive temperature coefficient. Therefore, there are cold resistance and thermal resistance.

4. The current carrying capacity of the environmental temperature fuse, the experiment is carried out under the environmental temperature of 25 ℃, this kind of experiment is affected by the change of the environmental temperature. The higher the ambient temperature, the higher the operating temperature of the fuse and the shorter its life. On the contrary, operating at a lower temperature will extend the life of the fuse.

The capacity of a fuse is referred to as its breaking capacity, and it is an important consideration when selecting the appropriate fuse for a given application. In essence, it represents the maximum amount of current that the fuse can handle before it blows or breaks under the rated voltage. During a short-circuit event, the fuse will be subjected to a large instantaneous overload current that is many times higher than the normal operating current. The safe and effective operation of the fuse requires it to remain intact without bursting or breaking, eliminating the short circuit in the process. Therefore, it is crucial to choose a fuse with a rated capacity that matches or exceeds the expected current load to prevent damage or interruption of the circuit.