How often should fuses be replaced?

[MacDaniel]

Fuses do not have a specified replacement interval and do not need to be replaced unless they are blown. The primary function of a fuse is to provide protection, whether it is used in automobiles or household appliances. Here is more information about fuses: 1. Composition: A typical fuse consists of three parts: the fuse element, which is the core of the fuse and serves to cut off the current when it melts (household fuses are often made of lead-antimony alloy); the electrode part, usually two, which connects the fuse element to the circuit and must have good conductivity without causing significant installation contact resistance; and the support part, which holds the delicate and flexible fuse element in place, ensuring the three parts form a rigid whole for easy installation and use. The support must have good mechanical strength, insulation, heat resistance, and flame retardancy, and should not break, deform, burn, or cause short circuits during use. 2. Definition: When a circuit malfunctions or behaves abnormally, the current may continuously rise, potentially damaging critical components in the circuit, burning out the circuit, or even causing a fire.