What sort of fuse have inside iron?

Iron can be found in certain types of fuses, specifically in those designed for high-current applications, such as circuit breakers or fuses used in electrical systems. These fuses often contain an iron core or use iron components to enhance conductivity and thermal management. Additionally, iron may be used in fuse elements that rely on a specific melting point to interrupt electrical flow when overloaded. However, the use of iron in fuses is less common compared to materials like copper or aluminum.