Cooper Bussmann FNQ-8 Cartridge Time Delay Fuse 8A 500V

Product Description

The COOPER BUSSMANN FNQ-8 is a cartridge-style, time-delay fuse rated at 8 amps and 500 volts AC with a 10 kA interrupting capacity. The fiber body measures 1.5 inches in overall length and 10.3 mm in diameter, fitting standard fuse holders used in control circuits, HVAC equipment, and light industrial panels. Time-delay action allows the fuse to ride through brief inrush currents without nuisance opening while still providing reliable overcurrent protection. Licensed electricians and HVAC technicians are the primary installers. The orange color coding aids fast visual identification during service.

This fuse is suited for general-purpose branch circuit and control circuit protection in residential and light commercial applications. Common installation points include motor control panels, HVAC control boards, and small-appliance circuits where a time-delay fuse is specified. Its 500-volt rating covers most single-phase and multi-phase low-voltage control circuits encountered in the field. The fuse mounts in a standard cartridge fuse holder; no special tooling is required for replacement.

Key Features

• 8-amp time-delay rating handles brief inrush currents without nuisance blowing
• 500-volt AC rating suitable for a wide range of control circuit applications
• 10 kA interrupting capacity at AC for reliable fault protection
• Fiber body construction at 1.5 inches length and 10.3 mm diameter
• Orange color coding for quick visual identification and sorting
• UL Listed, CSA Certified, CE Marked, and RoHS Compliant

Compatibility

Designed as an OEM-style replacement cartridge time-delay fuse for use in standard cartridge fuse holders rated for the FNQ series. Consult the equipment manufacturer documentation to confirm fuse holder compatibility before installation.

Installation Notes

Installation and replacement should be performed by a qualified electrician or licensed HVAC technician in accordance with the NEC and applicable local codes. Always disconnect and lock out power to the circuit before removing or installing the fuse. Use an appropriate fuse puller when extracting the cartridge from the fuse holder to avoid contact with energized components. Verify the replacement fuse amperage and voltage rating match the circuit requirements before restoring power.