LLNRK200 - 200Amp Fuse

LLNRK200 - 200Amp Fuse

Electrical protection shouldn't hinder normal equipment operation. When your motors start, transformers energize, or other high-inrush loads come online, temporary current surges are expected. The Littelfuse LLNRK200 200 Amp Class RK1 time-delay fuse is designed to accommodate these brief surges while providing dependable protection against sustained overloads and short circuits. Part of the Littelfuse POWR-PRO™ family, this current-limiting fuse combines high interrupting capacity with time-delay performance for demanding commercial and industrial electrical systems.

Key Features and Benefits

• 200 Amp Continuous Current Rating
• 250V AC Maximum Voltage Rating
• 125V DC Maximum Voltage Rating
• Class RK1 Current-Limiting Protection
• Time-Delay Opening Characteristics
• High AC Interrupting Capacity
• Reduced Unnecessary Openings During Equipment Startup
• Protection Against Overloads and Short Circuits
• POWR-PRO Series Performance
• Suitable for High-Inrush Electrical Loads
• Compatible Class H Fuse Block Upgrade Capability
• Fuse Block, Clip, or Holder Mounting
• Non-Indicating Design

Technical Specifications

• Manufacturer: Littelfuse
  
• Catalog Number: LLNRK200
  
• Series: LLNRK
  
• Product Family: POWR-PRO™
  
• Product Type: Current-Limiting Time-Delay Fuse
  
• Fuse Class: Class RK1
  
• Continuous Current Rating: 200 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
  
• Current-Limiting: Yes
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Compatible Holder Series: LFR25200
  
• Existing Fuse Block Compatibility: Compatible Class H fuse blocks, subject to application and equipment requirements
  

Material Compliance and Certifications

The Littelfuse LLNRK200 belongs to the POWR-PRO Class RK1 fuse series, designed for current-limiting overcurrent protection in appropriately rated electrical systems.

• Material Compliance: Verify current RoHS and REACH declarations in Littelfuse documentation
• Safety Certifications: Confirm applicable UL, CSA, and other product-specific approvals using current manufacturer records

The supplied product specifications identify the fuse classification and electrical performance ratings but do not independently establish individual safety certification listings or environmental compliance declarations. Verify these when required for a particular installation or project.

Where It Works Best

• Service Entrance Equipment
• Main Electrical Distribution Circuits
• Feeder Circuits
• General-Purpose Branch Circuits
• Industrial Motor Circuits
• Transformers
• High-Inrush Electrical Loads
• Industrial Machinery
• Commercial Electrical Distribution Systems
• Electrical System Maintenance
• Compatible Class H Fuse Block Upgrades