Cooper Bussmann LPS-RK-7SP Cartridge Time Delay Fuse RK1 7A

Product Description

The COOPER BUSSMANN LPS-RK-7SP is a cartridge-style, time delay fuse rated at 7 amps and classified as RK1 for high-performance overcurrent protection. Designed for general purpose applications, it provides 100 kA interrupting capacity at DC and 300 kA at AC (RMS), making it suitable for circuits where high fault currents must be safely interrupted. The fuse features a dual-element construction that tolerates harmless temporary overloads while responding quickly to sustained faults or short circuits. It measures 5 inches in overall length and 20.6 millimeters in diameter, fitting standard fuse holders rated for Class RK1. Electricians and industrial maintenance technicians are the primary installers.

This fuse is used in commercial and industrial electrical distribution panels, motor control circuits, and equipment protection applications where RK1-class time delay performance is required. The dual-element design makes it a common choice for motor branch circuits that draw inrush current on startup without triggering nuisance opens. It mounts in a standard cartridge fuse holder and is sold individually, with a minimum order quantity of 3 units.

Key Features

• RK1 class time delay cartridge fuse rated at 7 amps
• Dual-element design tolerates motor inrush current while protecting against sustained faults
• 300 kA interrupting capacity at AC (RMS) and 100 kA at DC
• Non-indicating fuse body — no visual blown indicator
• CE Certified, CSA C22.2 No. 248.12 Class 1422-02 File 53787 Certified, and UL Listed Guide JDDZ File E4273
• Mounts in standard Class RK1 cartridge fuse holders

Compatibility

Designed as an OEM-style replacement or direct-install Class RK1 cartridge fuse for standard fuse holders accommodating 5-inch by 20.6-millimeter cartridge fuses in commercial and industrial electrical systems.

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 fuses. Use properly rated fuse pullers when handling cartridge fuses — never remove or install a fuse with bare hands on an energized holder. Verify the replacement fuse amperage, class, and voltage rating match the circuit requirements and existing fuse holder specifications before installation.