Bussmann KTK-20 Fast-Acting Fuse

The Bussmann KTK-20 Limitron Fast-Acting Fuse is a compact 20 A midget fuse designed for 600 V AC service, measuring 13/32 inch in diameter and 1-1/2 inches long. It features a melamine fuse tube with nickel-plated bronze endcaps and ferrule-end terminations, and is non-indicating, single-element, fast-acting within the Limitron family. This supplemental fuse is commonly used to protect control circuits, lighting circuits, and meter circuits, delivering rapid interruption to minimize equipment damage during fault conditions. It carries an interrupting rating up to 100 kAIC at 600 V, providing a robust protection margin for small-form-factor installations. The KTK-20’s slim profile and proven performance make it a standard replacement option in panels and fixtures that require reliable, fast-acting overload protection without visual blow indication.