Cooper Bussmann FRN-R-35 Cartridge Fuse 35A 250V

Product Description

The COOPER BUSSMANN FRN-R-35 is a 35-amp, 250-volt Type FRN-R cartridge fuse from the Fusetron time-delay series. It is designed to provide dual-element, time-delay overcurrent protection, allowing it to withstand temporary motor inrush currents and other harmless overloads without nuisance tripping. The fuse delivers reliable short-circuit protection once a true fault condition occurs. It ships in a boxed format and is sold in a package of 10. Licensed electricians and industrial maintenance technicians install this fuse in motor circuits, control panels, and branch-circuit applications where time-delay characteristics are required.

The FRN-R-35 is suited for residential, commercial, and light industrial electrical systems. It is commonly installed in motor starter circuits, HVAC equipment disconnects, and control panels where inrush current from compressors or fan motors would otherwise cause a standard fuse to open prematurely. The time-delay design makes it a practical choice for protecting single-phase motor loads up to 35 amps at 250 volts.

Key Features

• 35-amp continuous current rating with dual-element time-delay design
• 250-volt AC rating suitable for single-phase branch circuits and motor circuits
• Type FRN-R cartridge form factor for use in Class RK5 fuseholders
• Fusetron time-delay characteristic tolerates motor inrush without nuisance opening
• Boxed packaging in a quantity of 10 for service stock or job-site supply

Compatibility

Designed as an OEM-style replacement cartridge fuse for Class RK5 fuseholders rated at 250 volts and 35 amps in residential and commercial electrical panels, motor circuits, and HVAC disconnect boxes.

Installation Notes

Installation must be performed by a qualified electrician in accordance with NEC requirements for overcurrent protection devices. Always de-energize and lock out the circuit before opening the fuseholder or replacing a fuse. Verify that the replacement fuse rating matches the circuit and equipment nameplate requirements before installing. Do not substitute a higher-amperage fuse to resolve repeated fuse openings — diagnose the underlying fault first.