Cooper Bussmann KTK-3 Cartridge Fast-acting Fuse 3A 600V

Product Description

The COOPER BUSSMANN KTK-3 is a cartridge-style, fast-acting fuse rated at 3 amps and 600 volts AC. It provides overcurrent protection in control circuits, instrumentation panels, and general-purpose electrical systems. The melamine body measures 1.5 inches in length and 10.3 mm in diameter, fitting standard cartridge fuse holders. With an interrupting capacity of 100 kA at AC, this fuse is suitable for circuits where high fault-current capability is required. Licensed electricians and control-panel technicians install this type of fuse in low-amperage branch circuits and equipment protection applications. It carries UL, CSA, CE, and RoHS credentials.

The KTK-3 is designed for general-purpose control circuit protection in residential, commercial, and light industrial settings. Typical applications include transformer secondary circuits, HVAC control boards, motor control centers, and instrumentation wiring. The fast-acting response characteristic makes it well suited for resistive loads and sensitive electronic circuits that require immediate interruption on overcurrent events. It mounts in a standard cylindrical cartridge fuse holder and requires no tools beyond what is needed to access the panel or holder assembly.

Key Features

• Fast-acting fuse response for resistive loads and sensitive control circuits
• 600-volt AC rating supports a wide range of control and instrumentation applications
• 100 kA interrupting capacity at AC provides high fault-current protection
• Melamine body construction offers thermal and chemical resistance
• Compact cartridge form factor fits standard cylindrical fuse holders
• UL Listed, CSA Certified, CE Certified, and RoHS Compliant

Compatibility

Designed as an OEM-style replacement for standard KTK-series cylindrical cartridge fuse holders rated for 600-volt, fast-acting fuses with a 10.3 mm diameter body.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and any applicable local codes. Always de-energize and lock out the circuit before replacing a fuse. Verify that the replacement fuse amperage and voltage ratings match the circuit requirements exactly. Do not substitute a higher-amperage fuse to resolve nuisance tripping, as this defeats overcurrent protection.