Cooper Bussmann LPS-RK-2-1/2SP Time Delay Fuse 2.5A RK1

Product Description

The COOPER BUSSMANN LPS-RK-2-1/2SP is a Class RK1 time delay cartridge fuse rated at 2.5 amps for general-purpose overcurrent protection in industrial and commercial electrical systems. The cartridge body measures 5 inches in overall length and 20.6 millimeters in diameter, fitting standard RK1 fuse holders. With an interrupting rating of 100 kA at DC and 300 kA at AC (RMS), it delivers high fault-current capacity in a compact form. The dual-element time delay design tolerates normal inrush currents while responding quickly to sustained overloads and short circuits. Licensed electricians and industrial maintenance technicians are the primary installers of this component.

This fuse is suited for residential, commercial, and light industrial branch circuit and feeder protection where Class RK1 performance is specified. Typical applications include motor branch circuits, transformer primaries, and control panel feeders where harmonic-rich or inrush-heavy loads are present. The non-indicating body provides no visual trip flag, so continuity testing is required during troubleshooting. It mounts in any standard RK1-compatible fuse holder or fuse block.

Key Features

• Class RK1 time delay, dual-element design tolerates motor inrush without nuisance opening
• High interrupting rating: 100 kA at DC and 300 kA at AC (RMS)
• Cartridge body: 5 inches overall length, 20.6 millimeters diameter
• Non-indicating construction — no external trip indicator
• CE Certified, CSA Certified (C22.2 No. 248.12), and UL Listed (Guide JDDZ)
• General-purpose fuse suitable for branch circuit and feeder overcurrent protection

Compatibility

Designed for use in standard Class RK1 fuse holders and fuse blocks. Consult the fuse holder manufacturer specifications to confirm dimensional and class compatibility before installation.

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 and lock out the circuit before removing or installing any fuse. Verify the fuse holder is rated for Class RK1 and confirm the holder contact blades are clean and undamaged prior to seating the cartridge. Do not use a non-indicating fuse as the sole diagnostic indicator — always test continuity with an appropriate meter when troubleshooting suspected opens.