Cooper Bussmann NOS-5 Cartridge Fuse K5 5A 600V

Product Description

The COOPER BUSSMANN NOS-5 is a Class K5 cartridge fast-acting fuse rated for 5 amps at 600 volts with a 50 kA interrupting capacity at AC and DC. The cartridge body measures 5 inches in overall length and 20.6 mm in overall diameter, designed to mount in a standard fuse holder. Licensed electricians and industrial maintenance technicians install this fuse to protect circuits from overcurrent conditions in general-purpose electrical applications. Its fast-acting timing means it responds quickly to overloads and short circuits, limiting downstream damage to equipment and wiring.

The NOS-5 is suited for general-purpose branch circuit protection in commercial, industrial, and light manufacturing environments. It installs in a fuse holder rated for Class K5 cartridge fuses and is appropriate for systems operating at up to 600 volts AC or DC. This fuse class is commonly found in motor branch circuits, control panels, and distribution equipment where fast-acting overcurrent protection is required.

Key Features

• 5 amp rating with 600-volt AC/DC capability
• 50 kA interrupting capacity for reliable short-circuit protection
• Class K5 cartridge fuse body, 5 inches in overall length
• Fast-acting timing for rapid response to overloads and short circuits
• CE Certified, CSA Certified, and UL Listed to UL 248-9

Compatibility

Designed as an OEM-style replacement Class K5 cartridge fuse for standard fuse holders accepting a 5-inch, 20.6 mm diameter fast-acting fuse at up to 600 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 removing or installing any fuse. Verify the fuse holder is rated for Class K5 cartridge fuses and confirm the replacement amperage matches the circuit's overcurrent protection requirements. Do not substitute a higher-amp fuse to correct a nuisance-tripping condition without first diagnosing the underlying fault.