Cooper Bussmann BP/FRN-R-50 Cartridge Fuse 50A 250V

Product Description

The COOPER BUSSMANN BP/FRN-R-50 is a Fusetron time-delay cartridge fuse rated at 50 amps and 250 volts, sold in a 2-pack. It is designed for use in circuits that require protection against both overloads and short circuits, with the time-delay characteristic allowing temporary inrush currents to pass without nuisance tripping. The FRN-R series uses a dual-element design, making it well suited for motor load applications where startup currents exceed steady-state operating values. Electricians and HVAC technicians install this fuse type in disconnect boxes, load centers, and equipment-side fuse blocks.

This fuse is commonly specified for residential and light commercial HVAC equipment, compressor circuits, motor starters, and similar inductive loads where a standard fast-acting fuse would trip prematurely. The 250-volt rating covers standard single-phase branch circuits. The carded 2-pack format is convenient for service vans and job-site restocking. The FRN-R class designation indicates a Rejection-style ferrule cartridge body, which prevents substitution with lower-rated fuse classes in listed fuseholders.

Key Features

• 50-amp rating with 250-volt AC maximum voltage
• Fusetron dual-element time-delay design tolerates motor inrush without nuisance opening
• FRN-R Rejection-style ferrule body prevents installation of lower-class fuses in mating fuseholders
• Compact ferrule cartridge dimensions fit standard 30- to 60-amp fuseholder blocks
• Sold as a carded 2-pack for convenient field restocking

Compatibility

Designed as an OEM-style replacement for residential and commercial motor-circuit branch protection using Class RK5 rejection ferrule fuseholders rated for 250 volts AC.

Installation Notes

Installation must be performed by a qualified electrician in accordance with the NEC and applicable local codes. Always de-energize and lock out the circuit before removing or installing fuses. Verify that the fuseholder is rated for the FRN-R rejection body and that the circuit voltage and amperage do not exceed the fuse ratings. Do not install a fuse with a higher ampere rating than the circuit or equipment requires.