LLNRK110 - 110Amp Fuse

LLNRK110 - 110Amp Fuse

When your motor starts, or a transformer is energized, the sudden current surge can be much higher than what the equipment draws during normal operation. That's expected. The problem comes when a fuse can't tell the difference between a brief startup surge and a real electrical fault. The Littelfuse LLNRK110 110 Amp Class RK1 time-delay fuse is built to handle those demanding conditions. Part of the Littelfuse POWR-PRO™ series, this dual-element fuse lets normal inrush currents pass while protecting against sustained overloads and short circuits. With a 110 Amp continuous current rating, 250V AC rating, and 125V DC rating, it's designed for appropriately rated industrial and commercial electrical systems, including motor circuits, transformers, feeders, and general-purpose branch circuits.

Key Features and Benefits

• 110 Amp Continuous Current Rating
• 250V AC / 125V DC Voltage Ratings
• Class RK1 Current-Limiting Protection
• High Short-Circuit Interrupting Capacity
• Dual-Element Time-Delay Design
• Reduced Nuisance Fuse Openings
• Spring-Loaded Thermal Overload Element
• Low-Resistance Construction
• Class H Fuse Block Compatibility
• Fuse Block, Clip, or Holder Mounting
• Non-Indicating Design

Technical Specifications

• Manufacturer: Littelfuse
  
• Catalog Number: LLNRK110
  
• Product Series: LLNRK
  
• Product Family: POWR-PRO™
  
• Product Type: Current-Limiting Time-Delay Fuse
  
• Fuse Class: Class RK1
  
• Continuous Current Rating: 110 Amps
  
• Maximum AC Voltage: 250V AC
  
• Maximum DC Voltage: 125V DC
  
• AC Interrupting Ratings: 200,000A and 300,000A at 250V AC, as listed in manufacturer specifications
  
• DC Interrupting Rating: 20,000A at 125V DC
  
• Opening Characteristic: Slo-Blo / Time Lag / Time Delay
  
• Element Configuration: Dual-Element
  
• Overload Element: Thermally Reversible, Spring-Loaded
  
• Fuse Indication: Non-Indicating
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Compatible Holder Series: LFR25200
  
• Fuse Block Compatibility: Suitable for Class RK1 fuse blocks and compatible existing Class H fuse blocks
  

Material Compliance and Certifications

The Littelfuse LLNRK110 belongs to the POWR-PRO Class RK1 fuse family and is designed for electrical applications that require current-limiting overload and short-circuit protection.

• Material Compliance: Verify current RoHS and REACH status using Littelfuse material declarations
• Safety Certifications: Confirm applicable UL, CSA, and other approvals through current manufacturer certification records

For installations with specific regulatory or environmental requirements, consult the latest manufacturer documentation to verify the certifications and material compliance declarations applicable to this catalog number.

Where It Works Best

• Industrial Motor Circuits
• Transformers
• Main and Feeder Circuits
• Service Entrance Equipment
• General-Purpose Branch Circuits
• Solenoids
• Fluorescent Lighting Circuits
• Equipment With High Inrush Currents
• Compatible Class H Fuse System Upgrades