Bussmann KTK-R-4

KTK-R-4 is a Bussmann LIMITRON fast-acting Class CC fuse rated for 4 A at 600 VAC, designed for low-voltage branch-circuit protection with current-limiting action that minimizes energy let-through during faults. The cylindrical fuse measures about 0.41 in in diameter by 1.5 in long, built on a melamine tube with nickel-plated bronze end caps, and employs a rejection-type design that fits only compatible KTK-R holders, preventing substitution with non‑KTK-R fuses. It is UL Listed for Branch Circuit Protection and CSA certified, with an interrupting rating of 200 kA RMS at 600 VAC, ensuring rapid interruption of fault currents. As part of the LIMITRON KTK-R family, this 4 A device provides fast response for protecting control circuits, motor starters, and other low-voltage loads in panels and industrial equipment. The product is packaged as a 10-pack (10PK) to support multi‑circuit protection needs.