Cooper Bussmann FNQ-6 Cartridge Time Delay Fuse 6A 500V

Product Description

The COOPER BUSSMANN FNQ-6 is a cartridge-style, time-delay fuse rated at 6 amps and 500 volts AC with a 10 kA interrupt rating. The fiber body measures 1.5 inches in length and 0.406 inches in diameter, fitting standard fuse holders used in control circuits, motor branch circuits, and supplemental protection applications. Licensed electricians and HVAC technicians install this fuse type in low-voltage control panels, transformer secondary circuits, and equipment requiring a time-delay characteristic to ride through inrush current without nuisance tripping. The orange color coding provides quick visual identification during service calls.

The FNQ-6 is suited for general-purpose overcurrent protection in residential and light commercial electrical and HVAC control systems. Its time-delay design allows temporary overcurrent conditions common during motor startup while still protecting downstream components from sustained fault current. It mounts in a standard cartridge fuse holder and is a common choice for protecting control transformers, fan motors, and other inductive loads where instantaneous fuses would trip prematurely.

Key Features

• 6-amp rating with time-delay fuse timing for inrush tolerance
• 500-volt AC rating with 10 kA interrupt capacity
• Fiber cartridge body construction, 1.5 inches long and 10.3 mm in diameter
• Orange color coding for fast visual identification
• CE Certified, CSA C22.2 No.248.14 certified, UL Listed 248-14, and RoHS Compliant

Compatibility

Designed for use in standard cartridge fuse holders that accept 10.3 mm diameter, 38.1 mm length fuses for general-purpose overcurrent protection applications.

Installation Notes

A licensed electrician should install or replace this fuse in accordance with the NEC and applicable local codes. De-energize and lock out the circuit before removing or installing any fuse. Use an appropriately rated fuse puller for cartridge fuses to avoid shock and body damage. Verify that the replacement fuse amp rating and interrupt rating match the circuit requirements before restoring power.