Cooper Bussmann FNQ-7 Cartridge Time Delay Fuse 7A 500V

Product Description

The COOPER BUSSMANN FNQ-7 is a cartridge-style, time-delay fuse rated at 7 amps and 500 volts AC, with a 10 kA interrupting rating. It measures 1.5 inches in overall length and 0.406 inches (10.3 mm) in diameter. The fiber body construction provides reliable insulation in a compact cylindrical form. Designed for general-purpose overcurrent protection, this fuse is intended for use in fuse holders and is a common choice for licensed electricians and panel technicians protecting low-amperage branch circuits and control circuits in commercial and industrial electrical systems.

This fuse is suited for control circuit protection, motor branch circuit applications, and equipment requiring time-delay characteristics to accommodate inrush current without nuisance tripping. The time-delay design allows momentary overloads to pass while still opening on sustained fault conditions. It is appropriate for both commercial and light industrial installations where a 500-volt, 7-amp cartridge fuse in a standard holder is specified. The orange body color aids in quick visual identification during service.

Key Features

• Time-delay fuse element tolerates temporary inrush current without nuisance opening
• Rated 7 amps at 500 volts AC with a 10 kA interrupting capacity
• Fiber cartridge body in a compact 1.5-inch length, 0.406-inch diameter form factor
• Orange body color for fast visual identification in fuse holders
• UL Listed, CSA Certified, CE Marked, and RoHS Compliant
• Mounts in standard cartridge fuse holders — no special tooling required

Compatibility

Designed as an OEM-style replacement for general-purpose cartridge fuse holders accepting a 10.3 mm diameter, 38.1 mm length time-delay fuse rated at 500 volts.

Installation Notes

Installation should be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and applicable local codes. Always de-energize and lock out the circuit before replacing any fuse. Use an appropriate fuse puller when removing or inserting cartridge fuses to avoid contact with energized parts. Verify that the replacement fuse amp rating and voltage rating match the circuit requirements before restoring power.