Cooper Bussmann FRS-R-7-1/2 RK5 Time Delay Fuse 7.5A

Product Description

The COOPER BUSSMANN FRS-R-7-1/2 is a cartridge-style, time delay fuse rated at 7.5 amps and classified RK5 for general purpose overcurrent protection. It measures 5 inches in overall length and 20.6 mm in diameter, fitting standard RK5 fuse holders. The dual-element, time delay design allows momentary inrush currents to pass without nuisance opening while still protecting circuits from sustained overloads and short circuits. This fuse is non-indicating and is intended for installation by licensed electricians working on motor branch circuits, HVAC equipment, and other inductive load applications where time delay characteristics are required.

This fuse is suited for residential and commercial electrical systems where RK5-class overcurrent protection is specified. Common applications include motor control panels, HVAC disconnect boxes, and other equipment requiring a time delay fuse to handle startup inrush currents. It mounts in a standard fuse holder and is appropriate for use in systems where CE, CSA, and UL compliance is required by code or specification.

Key Features

• 7.5-amp time delay rating handles inrush current without nuisance tripping
• RK5 fuse class for general purpose branch circuit and motor protection
• Dual-element construction provides both overload and short circuit protection
• Non-indicating design in a standard cartridge body
• CE Certified, CSA C22.2 No. 248.12 Certified, and UL Listed 248-12 Class RK5
• Mounts in standard RK5-compatible fuse holders

Compatibility

Designed as an RK5-class replacement fuse for use in standard cartridge fuse holders rated for Class RK5 fuses in branch circuit and motor circuit applications.

Installation Notes

Installation should be performed by a licensed 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 fuses. Verify the fuse holder is rated for RK5-class cartridge fuses and that the amperage rating matches the circuit design. Do not substitute a fuse of a higher amperage rating than what is specified for the circuit.