Electrical Fuses As every Electrical Fuses component requires an individual combination of material properties if it is to function optimally in its field of application, our ceramic experts are very much in demand as problem-solvers. Insulation is of course the most important point, but other properties such as high strength and form stability, resistance to aging, insensitivity to chemical influences and corrosion, tracking resistance as well as resistance to temperature changes and heat are all outstanding features of the Ceramtec ceramic elements used for fuse components.