LLSRK050ID - 50Amp Fuse

LLSRK050ID - 50Amp Fuse

When your industrial equipment stops unexpectedly, the last thing your maintenance team needs is a lengthy search for the problem. Every minute spent tracing an electrical fault can mean interrupted production, delayed operations, and unnecessary maintenance costs. The Littelfuse LLSRK050ID 50 Amp Class RK1 time-delay indicating fuse is engineered to help protect electrical circuits while making troubleshooting faster and more straightforward. Part of the Littelfuse Powr-Pro LLSRK_ID series, this industrial cartridge fuse combines current-limiting protection, advanced time-delay characteristics, and a patented visual indicator in one dependable solution.

Key Features and Benefits

• 50 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 Operation
• High Interrupting Capacity
• Precision-Formed Short-Circuit Elements
• Solid-State Overload Section
• No Moving Parts in the Overload Section
• Reduced Mechanical Fatigue Concerns

Technical Specifications

• Manufacturer: Littelfuse
  
• Catalog Number: LLSRK050ID
  
• Product Series: LLSRK_ID
  
• Product Family: Powr-Pro Fuse
  
• Product Type: Time-Delay Indicating Fuse
  
• Fuse Class: Class RK1
  
• Continuous Current Rating: 50 Amps
  
• Maximum AC Voltage: 600V AC
  
• Maximum DC Voltage: 300V DC
  
• Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
  
• Indicating Feature: Yes
  
• Indicator Technology: Patented Indicator™ Technology
  
• 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 Value: 300,000A at 600V AC
  
• DC Interrupting Rating: 20,000A at 300V DC
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Manufacturer-Listed Holder Series: LFR60060 Series
  
• Short-Circuit Elements: Precision-Formed
  
• Overload Section: Solid-State Design With No Moving Parts
  
• Current-Limiting Design: Yes
  

Material Compliance and Certifications

The manufacturer identifies the Littelfuse LLSRK050ID as a Class RK1 current-limiting fuse in the Powr-Pro LLSRK_ID series. Its construction includes precision-formed short-circuit elements and a solid-state overload section designed to improve protection performance while eliminating moving parts from the overload mechanism.

Where It Works Best

The LLSRK050ID is a practical choice for properly rated electrical systems where time-delay protection, high interrupting capacity, and quick identification of an opened fuse are important.

• Industrial Machinery
• Motor Control Circuits
• Manufacturing Equipment
• Electrical Control Panels
• Motor-Driven Equipment
• Electrical Distribution Equipment
• Circuits With Temporary Startup Current Surges
• Industrial Equipment Protection
• Plant Maintenance Applications
• High-Fault-Current Environments
• Compatible Class RK1 Fuse Blocks
• Compatible Fuse Clips and Holders