Fuse Fatigue Application Engineering FAQ

PublishTime：2021-01-07

This perception is a hold over from years ago when fuses were commonly constructed using zinc fuse elements. Zinc has a relatively low melting temperature and a high expansion coefficient.Through repeated circuit energizing and de-energizing, the zinc elements would heat up and cool down (expand and contract) causing them to fatigue over time and lower their current carrying capacity.
This is NOT the case with modern, current-limiting fuses that are made with either silver or copper fuse elements. These have a higher melting temperature than zinc and are not typically susceptible to fatiguing over time.
Your modern, current-limiting fuses should retain their performance characteristics for the life of the installation under normal operating conditions and proper sizing methods for the application.We frequently get reports that our current-limiting fuses are still working fine forty or fifty years after being installed.
There is no recommended replacement schedule for our fuses. When properly applied, they retain their performance characteristics until they are called upon to interrupt an overcurrent event –then they open and need replacing. We hope this gives you a clearer understanding of how fuses operate and how the old perception of fuse fatigue developed.

Brand of Product：	Eaton Bussmann
Part#：
Product Category：	Fuse More
Application：	More
Data Type：	FAQ More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	0810
Version Number：
Data Encoding：	SB-BU10502
Data Size：	71 KB

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