Cooper Bussmann FRS-R-6 RK5 Time Delay Fuse 6A

Product Description

The COOPER BUSSMANN FRS-R-6 is a cartridge-style, time-delay fuse rated at 6 amps in the RK5 class. It is designed for general-purpose overcurrent protection in industrial and commercial electrical circuits where harmless inrush currents must be tolerated without nuisance blowing. The fuse measures 5 inches (127 mm) in overall length and 20.6 mm in diameter, and mounts in a standard fuse holder. With a 20 kA interrupt rating at DC 200 V RMS, it provides reliable fault protection in demanding applications. Licensed electricians and industrial maintenance technicians are the primary installers of this component.

This fuse is suited for use in motor circuits, HVAC control panels, and industrial equipment where time-delay characteristics are necessary to handle startup surge currents. The RK5 class designation means it fits in any fuse holder or disconnect rated for Class RK5 or Class K5 fuses. It is appropriate for both residential panel subfeeds and light commercial control circuit protection where a 6-amp time-delay cartridge fuse is specified by the equipment manufacturer or the electrical designer.

Key Features

• 6-amp time-delay rating handles motor startup inrush without nuisance trips
• RK5 class cartridge body fits standard Class RK5 fuse holders and disconnects
• 20 kA interrupt rating at DC 200 V RMS for robust fault current protection
• Dual-element construction provides independent overload and short-circuit response
• Non-indicating design — visual inspection or a fuse tester is required to confirm blown status
• CE Certified, CSA Certified (C22.2 No. 248.12), and UL Listed (248-12 Class RK5 Guide JDDZ)

Compatibility

Designed as an OEM-style replacement cartridge fuse for any circuit or panel specifying a Class RK5, 6-amp, time-delay fuse in a standard cartridge fuse holder.

Installation Notes

Installation must be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize the circuit and verify absence of voltage with a meter before removing or installing any fuse. Confirm the fuse holder is rated for Class RK5 cartridge fuses at or above the circuit voltage and ampere interrupting capacity required. Never substitute a fuse of a different class, higher amperage, or lower interrupt rating than specified for the circuit.