If the fuse does not blow, its service life can usually reach 20-30 years as long as it works within its design range.
If the fuse is under harsh cyclic operating temperature (i.e. extremely cold or extremely hot), its service life will be shortened. This means that you need to check its usage environment. If the fuse is used in hot weather conditions, such as the temperature is usually higher than 35℃, its service life may be affected. Similarly, high temperature industrial applications (such as foundries) will also affect the service life of fuses.
However, such factors can be taken into account when selecting the fuse and determining its breaking capacity to reduce the fuse fatigue effect caused by heat. There are many factors affecting the service life of fuse, and it is extremely difficult to predict. Each application is different, but calculation can be used to ensure that the fuse provides good overcurrent protection and long service life.