Cooper Bussmann BP/FRN-R-40 Cartridge Fuse 40A 250V

Product Description

The COOPER BUSSMANN BP/FRN-R-40 is a Type FRN-R time-delay cartridge fuse rated at 40 amps and 250 volts. Sold as a 2-pack, it follows the Fusetron time-delay design, which allows temporary motor inrush currents to pass without nuisance tripping while still providing reliable short-circuit and overload protection. The fuse body measures 3 inches in length and 0.81 inches in diameter. Licensed electricians and HVAC technicians install this class of fuse in motor circuits, compressor loads, and other inductive equipment that draws high startup current before settling to normal operating amperage.

Type FRN-R fuses are widely used in residential and light commercial applications wherever a 250-volt, dual-element time-delay fuse is required. Common installation points include disconnect boxes serving air conditioning compressors, refrigeration units, and industrial motor branch circuits. The carded packaging keeps both fuses protected and organized for field service calls or shop stock.

Key Features

• 40-amp, 250-volt rating suitable for motor and compressor branch circuits
• Dual-element Fusetron time-delay design prevents nuisance tripping on motor inrush
• Type FRN-R form factor for use in compatible Class RK5 fuse holders and disconnects
• Cartridge body measures 3 inches long by 0.81 inches in diameter
• Sold as a carded 2-pack for convenient field or shop use

Compatibility

Designed as an OEM-style replacement Type FRN-R cartridge fuse for use in Class RK5 fuse holders and disconnect switches rated for 250 volts.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC). Always open and lockout/tagout the disconnect switch before replacing a fuse. Verify that the replacement fuse amperage and voltage ratings match the circuit requirements and the label on the disconnect enclosure. Never substitute a higher-amperage fuse to correct a tripping condition without first diagnosing the underlying fault.