LLNRK500 - 500Amp Fuse

LLNRK500 - 500Amp Fuse

The Littelfuse LLNRK.500 is a 0.5 Amp (1/2 Amp), 250V Class RK1 time-delay fuse from the POWR-PRO series. It protects appropriately rated electrical circuits against overloads and short circuits while allowing temporary current surges that can occur during normal equipment operation.

Here's why that matters. Some electrical loads draw a brief burst of extra current when they're first energized. A fuse that responds too quickly may open even though the equipment is operating as intended. The LLNRK.500 uses a dual-element design with a thermally reversible, spring-loaded overload element to provide time-delay performance. This helps you reduce nuisance fuse openings caused by acceptable temporary inrush currents, without sacrificing protection against sustained overloads.

Key Features and Benefits

• Precise 0.5 Amp Protection
• Time-Delay Performance
• Dual-Element Construction
• Class RK1 Current Limiting
• High AC Interrupting Capacity
• DC Circuit Capability
• Low-Resistance Design
• Flexible Fuse-Block Installation
• Potential Class H Upgrade
• Non-Indicating Construction

Technical Specifications

• Manufacturer: Littelfuse
  
• Catalog Number: LLNRK.500
  
• Product Series: LLNRK
  
• Product Family: POWR-PRO
  
• Product Type: Current-Limiting, Dual-Element Time-Delay Fuse
  
• Fuse Classification: Class RK1
  
• Continuous Current Rating: 0.5 Amps (1/2 Amp)
  
• Maximum AC Voltage: 250V AC
  
• Maximum DC Voltage: 125V DC
  
• AC Interrupting Ratings: 200,000A and 300,000A at 250V AC, as specified by Littelfuse
  
• DC Interrupting Rating: 20,000A at 125V DC
  
• Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
  
• Number of Protective Elements: Two
  
• Thermal Overload Element: Thermally Reversible, Spring-Loaded
  
• Current-Limiting: Yes
  
• Fuse Status Indication: Non-Indicating
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Specified Holder Series: LFR25030
  

Material Compliance and Certifications

The manufacturer identifies the Littelfuse LLNRK.500 as a Class RK1, dual-element, current-limiting time-delay fuse in the POWR-PRO product family.

• UL Listing: Specific listing details should be confirmed against current Littelfuse documentation.
• CSA Certification: Verify applicable certification status using current manufacturer records.
• RoHS Compliance: Consult the latest Littelfuse material compliance documentation.
• REACH Compliance: Consult the latest Littelfuse material compliance documentation.

Where It Works Best

• Low-Current General-Purpose Circuits
• Transformer Circuits
• Solenoid Circuits
• Fluorescent Lighting Circuits
• Motor-Related Circuits
• High-Inrush Electrical Components
• Class H Fuse Block Upgrades