Cooper Bussmann FRN-R-1-1/2 RK5 Time Delay Fuse 1.5A

Product Description

The COOPER BUSSMANN FRN-R-1-1/2 is a cartridge-style, time delay fuse rated at 1.5 amps and classified as RK5. It features a dual-element design that tolerates brief inrush currents without nuisance tripping, while still opening quickly under a sustained overload or short circuit condition. The fuse body measures 2 inches in overall length and 14.3 mm in diameter, and it is a non-indicating type. Electricians and industrial maintenance technicians install this fuse in fuse holders on branch circuits and equipment where motor loads, transformers, or other inductive loads require time delay protection.

This fuse is suited for residential, commercial, and light industrial electrical systems where RK5-class overcurrent protection is specified. Typical applications include motor branch circuits, control panels, HVAC equipment disconnect boxes, and other installations governed by the NEC that require Class RK5 time delay fusing. The fuse mounts in a standard fuse holder accepting the cartridge form factor and is sold individually, with a minimum order quantity of 3 units.

Key Features

• Class RK5 time delay fuse with dual-element construction for inrush current tolerance
• Rated 1.5 amps for precise branch circuit and equipment protection
• 20 kA interrupting rating at DC 200 volts RMS for robust fault clearing
• Non-indicating design in a compact 2-inch cartridge body
• CE Certified, CSA C22.2 No. 248.12 Certified, and UL Listed 248-12 Class RK5
• Mounts in standard fuse holders for straightforward replacement

Compatibility

Designed as an RK5-class replacement fuse for use in standard cartridge fuse holders that accept the 2-inch, 14.3 mm diameter form factor on branch circuits requiring time delay overcurrent protection.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lock out the circuit before removing or installing the fuse. Verify the fuse holder is rated for Class RK5 cartridge fuses and that the replacement amperage matches the circuit requirements exactly. Never install a fuse with a higher amperage rating than the circuit is designed to carry.