Cooper Bussmann FRN-R-15ID RK5 Time Delay Fuse 15A

Product Description

The COOPER BUSSMANN FRN-R-15ID is a cartridge-style, time-delay fuse rated at 15 amps, designed for general-purpose overcurrent protection in industrial and commercial electrical systems. Classified as RK5, it features a dual-element construction that tolerates temporary inrush currents while still responding quickly to sustained overloads and short-circuit faults. The fuse measures 2 inches in overall length and 0.56 inches in diameter, fitting standard RK5 fuse holders. Interrupting capacity reaches 20 kA at DC 200 volts RMS. It carries CE, CSA, and UL listings, making it suitable for installations requiring certified overcurrent protection devices.

This fuse is used in fuse holders and panelboard fuse blocks across light industrial, commercial, and heavy-duty residential applications. The dual-element, time-delay design makes it a common choice for motor branch circuits, HVAC equipment feeders, and general-purpose load centers where brief startup surges must not cause nuisance trips. Licensed electricians and maintenance electricians install this fuse during new construction, panel upgrades, and equipment service calls where RK5-class protection is specified.

Key Features

• RK5 fuse class with dual-element construction for time-delay operation
• 15-amp rating with 20 kA interrupting capacity at DC 200 volts RMS
• Indicating fuse design provides visual confirmation of a blown fuse
• Compact cartridge body: 2 inches OAL, 0.56 inches diameter
• CE Certified, CSA C22.2 No. 248.12 Certified, and UL Listed 248-12 Class RK5
• Fits standard RK5 fuse holders without modification

Compatibility

Designed as an OEM-style replacement for RK5 Class cartridge fuse holders used in general-purpose branch circuit and feeder applications.

Installation Notes

Installation must 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 a fuse. Use an insulated fuse puller rated for the voltage of the circuit. Verify the replacement fuse matches the amperage, voltage, and class rating specified on the equipment nameplate or panel schedule before installation.