Cooper Bussmann FNQ-R-3-1/2 3.5A Cc Time Delay Fuse

Product Description

The COOPER BUSSMANN FNQ-R-3-1/2 is a CC-class, time delay cartridge fuse rated at 3.5 amps, designed for general-purpose overcurrent protection in control circuits and low-amperage branch circuits. It features a rejection-style body that prevents substitution with non-CC-class fuses, ensuring code-compliant installations. The fuse measures 1.5 inches in overall length and 10.3 mm in diameter, and mounts in a standard CC fuse holder. Electricians and controls technicians install this fuse in motor control panels, HVAC control circuits, and similar low-current industrial or commercial applications where time-delay characteristics are required to ride through inrush current without nuisance opening.

This fuse is suited for residential and light commercial control panels, HVAC equipment control boards, and motor control centers where CC-class fusing is specified. The time delay rating allows the fuse to tolerate brief startup surges while still providing reliable protection against sustained overloads and short circuits. Its cartridge form factor and rejection feature make it a standard choice wherever the circuit design calls for a Class CC time delay fuse in a holder-mounted configuration.

Key Features

• CC-class rejection body prevents installation of non-CC fuses in CC fuse holders
• Time delay rating accommodates motor inrush and transformer energization without nuisance tripping
• 3.5-amp rating suitable for low-current control and branch circuits
• Compact cartridge form: 1.5 inches long, 10.3 mm diameter
• 200 kA interrupting rating at AC RMS for high fault-current environments
• UL Listed 248-4 Class CC, CSA Class CC certified, CE certified, and RoHS compliant

Compatibility

Designed for use in standard CC-class fuse holders. The rejection-style body ensures it fits only CC-rated holders, making it a direct fit wherever a Class CC time delay fuse at 3.5 amps is specified.

Installation Notes

Installation must be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and any applicable local codes. Always de-energize and lockout/tagout the circuit before replacing or installing fuses. Verify the fuse holder is rated for CC-class cartridge fuses before installation. Do not substitute a non-time-delay or non-CC-class fuse in applications where a time delay or rejection feature is required by the circuit design.