Cooper Bussmann FRS-R-30 Cartridge Time Delay Fuse RK5 30A

Product Description

The COOPER BUSSMANN FRS-R-30 is a Class RK5 cartridge time delay fuse rated at 30 amps, designed for general-purpose overcurrent protection in industrial, commercial, and trade electrical systems. Built with a dual-element construction, it provides reliable time delay performance that allows harmless inrush currents to pass while still responding quickly to sustained overloads and short circuits. The fuse measures 5 inches in overall length and 20.6 mm in diameter, fitting standard RK5-rated fuse holders. It carries CE, CSA, and UL listings, making it suitable for installations governed by applicable electrical codes and standards. Licensed electricians and maintenance technicians are the primary installers of this component.

The FRS-R-30 is suited for general-purpose branch circuit and feeder protection in residential, commercial, and light industrial applications. Its time delay characteristic makes it well-matched for motor branch circuits, transformer primaries, and other loads that draw elevated inrush current on startup. The non-indicating design is standard for this class of fuse. It mounts in a compatible RK5 fuse holder and is sold individually, though it is available in multiples of 10 per order.

Key Features

• Class RK5 dual-element cartridge construction for time delay overcurrent protection
• 30-amp rating suitable for motor and general-purpose branch circuit applications
• 5-inch overall length and 20.6 mm diameter for standard RK5 fuse holder fitment
• Non-indicating design with no visual blown-fuse indicator
• CE Certified, CSA C22.2 No. 248.12 Certified, and UL Listed 248-12 Class RK5

Compatibility

Designed for use in Class RK5 fuse holders. Verify holder ampere and voltage ratings match the fuse before installation. No specific compatible equipment models were identified in the available product data.

Installation Notes

Installation should be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and any applicable local codes. De-energize the circuit completely and verify zero voltage with a meter before removing or installing the fuse. Use an appropriately rated fuse puller when servicing cartridge fuses in live panels after de-energization. Confirm the fuse holder is rated for Class RK5 fuses at the required amperage and voltage before installation.