The KLKR series of fast-acting fuses are designed for general-purpose branch circuit protection. Their compact size, fast overload response and current limiting design make them ideal for OEM equipment and control panels. They are widely used in lighting circuits and control transformer circuits where fast overload response is required. These KLKR series Class CC fuses have a reject feature that prevents substitution of lower rated fuses.Because of their compact size, these fuses provide excellent branch-circuit protection in a fraction of the space required for other classes of fuses.