Cooper Bussmann NON-40 Cartridge Fuse 40A 250V

Product Description

The COOPER BUSSMANN NON-40 is a 40-amp, 250-volt Type NON general purpose cartridge fuse designed for overcurrent protection in a wide range of electrical circuits. Rated at 40 amps with a 250-volt AC maximum, this non-time-delay fuse responds quickly to overloads and short-circuit conditions. The cartridge body measures 3 inches in length by 0.81 inches in diameter, fitting standard fuse blocks and disconnect switches sized for Class K and H fuse formats. Licensed electricians and industrial maintenance technicians are the primary installers. The NON-40 is sold in a boxed package of 10 units.

This fuse is suited for residential, commercial, and light industrial electrical systems where general-purpose branch-circuit or feeder protection is required. Typical applications include motor branch circuits without high inrush demands, lighting circuits, heating loads, and panelboard disconnect applications. The non-time-delay design makes it appropriate for loads that do not produce significant startup surge currents. It is a common fuse type stocked in service vans for quick field replacement during maintenance or troubleshooting calls.

Key Features

• 40-amp continuous current rating with 250-volt AC maximum
• Non-time-delay response for fast overcurrent and short-circuit protection
• Cartridge body: 3 inches long by 0.81 inches in diameter for standard fuse block fitment
• General-purpose Type NON classification for broad circuit applications
• Boxed packaging of 10 units for shop and service truck stocking

Compatibility

Designed as an OEM-style replacement and general-use cartridge fuse for standard 30-amp-class fuse blocks, disconnects, and panelboards accepting Type NON non-time-delay cartridge fuses rated 250 volts AC.

Installation Notes

Installation and replacement of cartridge fuses must be performed by a qualified electrician in accordance with the National Electrical Code (NEC). Always de-energize and lock out the circuit at the upstream disconnect or breaker before handling fuses. Use an insulated fuse puller rated for the voltage class when removing or inserting cartridge fuses — never use bare hands or uninsulated pliers. Verify that the replacement fuse amp rating and voltage rating match the circuit requirements before restoring power.