LLSRK025ID - 25Amp Fuse

LLSRK025ID - 25Amp Fuse

When your fuse opens mid-workday, the last thing your maintenance team needs is a lengthy search for the problem. The Littelfuse LLSRK025ID 25 Amp Class RK1 time-delay indicating fuse is designed to make electrical protection more effective and troubleshooting less frustrating. Part of the Littelfuse LLSRK_ID series and Powr-Pro fuse family, this industrial cartridge fuse combines high interrupting capacity, current-limiting performance, and convenient blown-fuse indication in one dependable solution.

Rated for 25 amps of continuous current, up to 600V AC and 300V DC, the Littelfuse LLSRK025ID offers the time-delay characteristics needed for circuits designed to handle temporary current surges. Rather than opening unnecessarily during short-duration inrush conditions, its Slo-Blo design helps maintain circuit continuity while still protecting against overloads and short circuits.

Key Features and Benefits

• 25 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

Technical Specifications

• Manufacturer: Littelfuse
  
• Catalog Number: LLSRK025ID
  
• Product Series: LLSRK_ID
  
• Product Family: Powr-Pro Fuse
  
• Product Type: Time-Delay Indicating Fuse
  
• Fuse Class: Class RK1
  
• Continuous Current Rating: 25 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 LLSRK025ID belongs to the LLSRK_ID series of Class RK1 current-limiting fuses. Its design incorporates precision-formed short-circuit elements and a solid-state overload section intended to deliver consistent electrical protection while reducing mechanical wear concerns.

Do not treat the two manufacturer-published AC interrupting values as interchangeable certification ratings without further documentation. For projects requiring particular safety approvals, environmental compliance, or material declarations, confirm the applicable requirements against current manufacturer records.

Where It Works Best

The Littelfuse LLSRK025ID suits appropriately rated electrical applications where dependable overcurrent protection, time-delay performance, and fast fault identification matter.

• 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