Cooper Bussmann FNA-30 Cartridge Time Delay Fuse 30A

Product Description

The COOPER BUSSMANN FNA-30 is a cartridge-style, time delay fuse rated at 30 amps and 32 volts, designed for use in fuse holder mounts across light industrial, HVAC control circuit, and low-voltage electrical applications. Built with a dual-element construction, it tolerates brief inrush currents while still opening on sustained overloads. The gray body carries a pin-style fault indicator, giving technicians a fast visual confirmation of a blown condition without removing the fuse from the holder. Overall length is 1.5 inches. The FNA-30 meets CE, CSA, and UL listing requirements, making it suitable for jobs where third-party certification is required.

This fuse is suited for low-voltage DC control circuits in residential and light commercial equipment. Typical applications include motor control panels, HVAC equipment control boards, and instrumentation circuits operating at or below 32 volts DC. The time delay characteristic makes it appropriate where motor starting inrush or capacitor charge currents must be tolerated without nuisance opens. It installs in a compatible cartridge fuse holder. Sold individually.

Key Features

• 30-amp rating with time delay characteristic for inrush tolerance
• 32-volt DC rating suitable for low-voltage control circuits
• Dual-element design distinguishes inrush from sustained fault current
• Pin indicator provides immediate visual indication of a blown fuse
• Compact cartridge body at 1.5 inches overall length fits standard holders
• CE Certified, CSA Class 1422-01 File 53787 Certified, and UL Listed Guide JDYX File E19180

Compatibility

Designed for use in cartridge fuse holders accepting the FNA series form factor; verify holder rating and fuse clip spacing before installation.

Installation Notes

Installation and replacement should be performed by a qualified electrician or licensed HVAC technician in accordance with NEC requirements. Always de-energize the circuit and confirm zero voltage with a meter before removing or installing the fuse. Use an appropriately rated fuse puller when extracting the cartridge from its holder to avoid contact with energized clips. Do not replace a blown fuse without first diagnosing and correcting the root cause of the overcurrent condition.