The KTK-20 is a non-indicating fast-acting supplemental electrical fuse designed to open when exposed to a short circuit or overload condition. The KTK-20 is commonly used in control circuits, lighting circuit protection, and meter circuits. The KTK-20 is constructed from nickel-plated endcaps and melamine tube. The electrical ratings for this fuse are 20 Amps, 600 Vac, and a max interrupt rating of 100 kA, 600 Vac. The fuse is typically installed in an electrical fuse block and is cylindrical with dimensions of 1.5" X 0.41" and a weight of 0.18 lb. The packaging contains five KTK-20 fuses.