Littelfuse KLNR006 Class RK1 Time-delay Fuse 250V

Product Description

The LITTELFUSE KLNR006 is a Class RK1 time-delay fuse rated at 250 volts, designed for overcurrent protection in demanding electrical and mechanical systems. Class RK1 fuses deliver a high degree of current limitation, reducing let-through energy during fault conditions. The time-delay characteristic allows the fuse to withstand temporary inrush currents without nuisance opening, making it well suited for motor loads, transformers, and other equipment with high startup demand. Licensed electricians and industrial maintenance technicians are the primary installers of this fuse type.

This fuse is used in residential, commercial, and light industrial electrical panels, disconnect switches, and fused equipment where Class RK1 protection is specified. Typical applications include HVAC equipment disconnects, motor branch circuits, and control panel protection where National Electrical Code branch-circuit fuse requirements call for a current-limiting, time-delay fuse. The KLNR006 fits standard Class RK1 fuse holders and rejection-style fuse blocks that accept this form factor.

Key Features

• Class RK1 current-limiting design reduces fault let-through energy
• Time-delay characteristic tolerates motor and transformer inrush without nuisance blowing
• 250-volt rating covers a wide range of single-phase and control-circuit applications
• Rejection-style form factor fits Class RK1 holders and blocks, preventing installation of lower-rated fuse classes

Compatibility

Designed as an OEM-style replacement for Class RK1 rejection fuse holders and fused disconnect switches rated for 250-volt service.

Installation Notes

Installation must be performed by a qualified electrician in accordance with applicable NEC requirements. Always de-energize and lock out the circuit before removing or installing fuses. Use an insulated fuse puller rated for the circuit voltage when servicing fused equipment. Verify that the replacement fuse ampere rating and voltage rating match the equipment nameplate before energizing.

Technical Specifications

• Fuse Class: RK1
• Voltage Rating: 250 volts
• UPC: 07945828058

Standard Information

• Brand: LITTELFUSE
• Manufacturer Part Number: KLNR006