Cooper Bussmann LPS-RK-8SP Time Delay Fuse 8A RK1

Product Description

The COOPER BUSSMANN LPS-RK-8SP is a time delay cartridge fuse rated at 8 amps and classified as RK1, designed for general-purpose overcurrent protection in demanding electrical systems. It features a dual-element construction that tolerates harmless inrush currents while responding quickly to sustained overloads and short circuits. The fuse body measures 5 inches in overall length and 20.6 mm in diameter, fitting standard RK1 fuse holders. With an interrupting capacity of 100 kA at DC and 300 kA at AC (RMS), this fuse is suited for circuits where high available fault current is a concern. Licensed electricians and industrial maintenance technicians are the primary installers.

This fuse is intended for use in industrial control panels, motor branch circuits, and power distribution equipment where RK1 class protection is specified. The time delay characteristic makes it well suited for motor starter circuits, transformer primaries, and other loads that draw elevated inrush current on startup without indicating a fault condition. It mounts in a standard RK1 fuse holder and is sold individually, with a minimum order quantity of 10 units per order.

Key Features

• 8 amp rating with time delay characteristic for inrush-tolerant circuit protection
• RK1 fuse class with dual-element construction
• 100 kA interrupting rating at DC, 300 kA at AC (RMS)
• Overall length of 5 inches (127 mm), diameter of 20.6 mm
• Non-indicating fuse body in standard cartridge form factor
• CE Certified, CSA Certified (C22.2 No. 248.12), and UL Listed (Guide JDDZ File E4273)

Compatibility

Designed as an OEM-style replacement for RK1 class cartridge fuse applications requiring a 5-inch, 8 amp time delay fuse in a standard fuse holder.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC). Always de-energize and lock out the circuit before removing or installing a fuse. Verify that the replacement fuse matches the amperage, voltage, and class marked on the original equipment nameplate. Do not substitute a different fuse class for RK1 where RK1 protection is specified by the equipment manufacturer.