Cooper Bussmann FRS-R-15 RK5 Time Delay Fuse 15A

Product Description

The COOPER BUSSMANN FRS-R-15 is a cartridge-style, time-delay fuse rated at 15 amps and classified as RK5, designed for general-purpose overcurrent protection in industrial and commercial electrical systems. 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 it to tolerate brief inrush currents without nuisance blowing, while still providing reliable short-circuit and overload protection. Licensed electricians and maintenance technicians install this fuse in motor branch circuits, HVAC equipment, and power distribution panels where controlled response to transient current is required.

This fuse is suited for use in residential and commercial applications where RK5-class overcurrent protection is specified. Typical installations include motor control centers, HVAC unit disconnects, and general branch circuit protection in industrial panels. The non-indicating design is standard for this class of fuse. It mounts in a conventional fuse holder sized for RK5 cartridge fuses.

Key Features

• RK5 fuse class with time-delay (dual-element) construction for motor and HVAC circuit protection
• 15 amp rating with 20 kA interrupting capacity at DC 200 (RMS)
• 5 inches overall length, 20.6 mm diameter for standard RK5 holder fit
• Non-indicating design — no visual trip indicator
• CE Certified, CSA C22.2 No. 248.12 Certified (File 53787), and UL Listed 248-12 Class RK5 (Guide JDDZ File E4273)

Compatibility

Designed for use in fuse holders rated for RK5-class cartridge fuses. Suitable as a direct replacement in any panel or disconnect specifying a 15A RK5 time-delay cartridge fuse of this dimensional profile.

Installation Notes

Installation and replacement of branch circuit fuses must be performed by a licensed electrician in accordance with the NEC (NFPA 70) and all applicable local codes. Always de-energize and lock out the circuit before removing or installing the fuse. Verify the fuse holder is rated for RK5 class and that the replacement fuse matches the circuit amperage rating. Do not substitute a higher-amperage fuse for a blown fuse without engineering review of the circuit.