Cooper Bussmann LPS-RK-5SP Time Delay Fuse 5A RK1

Product Description

The COOPER BUSSMANN LPS-RK-5SP is a time delay cartridge fuse rated at 5 amps in the RK1 class, designed for general-purpose overcurrent protection in demanding electrical systems. At 5 inches overall length and 20.6 mm diameter, this two-element fuse provides reliable time delay performance that allows motors and other inductive loads to tolerate temporary inrush current without nuisance tripping. It carries interrupting ratings of 100 kA at DC and 300 kA at AC (RMS), making it suitable for high-fault-current environments. Licensed electricians and industrial maintenance technicians are the primary installers.

This fuse is intended for use in fuse holders configured for RK1 class cartridge fuses. Typical applications include motor branch circuits, control panels, and industrial machinery where time delay characteristics are required to ride through startup inrush. The RK1 class designation indicates a current-limiting fuse with a high interrupting rating, appropriate for both commercial and light industrial installations where fault current levels demand robust overcurrent protection.

Key Features

• RK1 class current-limiting fuse with time delay for motor and inductive load protection
• 5 amp rating with 300 kA interrupting rating at AC (RMS) and 100 kA at DC
• Two-element construction provides accurate time delay without sacrificing fault response
• Non-indicating design in a standard cartridge body for fuse holder mounting
• CE Certified, CSA Certified (CSA C22.2 No. 248.12), and UL Listed (Guide JDDZ File E4273)
• 5 inches overall length and 20.6 mm diameter for compatibility with standard RK1 fuse holders

Compatibility

Designed for use in fuse holders accepting RK1 class cartridge fuses. Verify holder ratings match the fuse voltage, amperage, and class before installation.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and any applicable local codes. De-energize and lockout/tagout the circuit before removing or installing any fuse. Confirm the fuse holder is rated for RK1 class fuses and that the system voltage and available fault current fall within the fuse ratings. Never substitute a fuse of a different class, higher amperage, or lower interrupting rating for this fuse.