LLSRK020ID - 20Amp Fuse

LLSRK020ID - 20Amp Fuse

When your electrical equipment stops unexpectedly, finding the problem quickly can make all the difference. The Littelfuse LLSRK020ID 20 Amp Class RK1 time-delay indicating fuse protects electrical circuits while making maintenance and troubleshooting easier. Part of the Littelfuse Powr-Pro family, this industrial cartridge fuse combines current-limiting protection, time-delay performance, and patented Indicator™ technology to help keep industrial and commercial electrical systems operating efficiently.

Key Features and Benefits

• 20 Amp Continuous Current Rating
• 600V AC / 300V DC Voltage Ratings
• Class RK1 Current-Limiting Protection
• Patented Indicator™ Technology
• Darkening Blown-Fuse Indicator Window
• Slo-Blo / Time-Delay Performance
• High Interrupting Capacity
• Precision-Formed Short-Circuit Elements
• Solid-State Overload Section
• No Moving Parts in the Overload Section
• Reduced Nuisance Fuse Openings
• Improved Cycling Characteristics
• Faster Fault Identification
• Simplified Electrical Maintenance
• Reduced Troubleshooting Time
• Versatile Industrial Applications
• Industrial Cartridge Construction

Technical Specifications

• Manufacturer: Littelfuse
  
• Catalog Number: LLSRK020ID
  
• Product Series: LLSRK_ID
  
• Product Family: Powr-Pro Fuse
  
• Product Type: Time-Delay Indicating Fuse
  
• Fuse Class: Class RK1
  
• Continuous Current Rating: 20 Amps
  
• Maximum AC Voltage: 600V AC
  
• Maximum DC Voltage: 300V DC
  
• Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
  
• Indicating Feature: Yes
  
• Indicator Operation: Window Darkens When Fuse Opens
  
• Fuse Size / Style: Industrial Cartridge
  
• AC Interrupting Rating: 200,000A at 600V AC
  
• Additional Manufacturer-Published AC Interrupting Rating: 300,000A at 600V AC
  
• DC Interrupting Rating: 20,000A at 300V DC
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Manufacturer-Listed Holder Series: LFR60030 Series
  
• Short-Circuit Elements: Precision-Formed
  
• Overload Section: Solid-State Design With No Moving Parts
  

Material Compliance and Certifications

The Littelfuse LLSRK020ID is part of the LLSRK_ID series of Class RK1 current-limiting fuses. Its construction includes precision-formed short-circuit elements and a solid-state overload section designed to deliver dependable protection without moving mechanical components.

The two published AC interrupting figures should not be assumed to represent identical certification conditions. Where a project requires a particular listed interrupting rating, regulatory approval, or environmental declaration, consult the current manufacturer documentation before specifying the fuse.

Where It Works Best

• Industrial Machinery
• Motor Control Circuits
• Electrical Control Panels
• Manufacturing Equipment
• Commercial Electrical Systems
• Industrial Control Equipment
• Motor-Driven Equipment
• Circuits With Temporary Startup Current Surges
• Maintenance-Intensive Facilities
• Electrical Distribution Equipment
• Compatible Class RK1 Fuse Blocks
• Compatible Fuse Clips and Holders