Cooper Bussmann KTK-3 Fuse

KTK-3 is a 3 A fast-acting Bussmann KTK Series fuse designed for compact protection in control, lighting, and metering circuits. This 13/32" x 1-1/2" (10.3 mm x 38.1 mm) cartridge fuse features a melamine tube with nickel-plated bronze end caps and ferrule-style end connections, suitable for 600 V AC service. It delivers an interrupting rating up to 100 kA at 600 V and is a non-indicating device, meaning there is no built-in visual indicator when the fuse has opened. As a fast-acting (Limitron) fuse, it responds quickly to overcurrent conditions to safeguard sensitive loads, while remaining compact enough for panelboards and equipment enclosures that require 3 A protection. Typical applications include protection of control circuitry, ballast and lighting circuits, and metering hardware in industrial or commercial electrical installations. When replacing, confirm the amperage rating (3 A), voltage rating (600 VAC), and end-cap/connection style to match the existing fuseholder and improve reliability of circuit protection.