LLNRK025 - 25Amp Fuse

LLNRK025 - 25Amp Fuse

Electrical equipment doesn't always draw current at a steady rate. Motors need extra current to start, transformers can experience a brief surge when energized, and certain lighting systems have their own startup demands.

Of course, handling startup current is only part of the job. The LLNRK025 time-delay fuse also features a current-limiting design intended to reduce the amount of fault current and energy passed through the circuit during qualifying short-circuit events. Littelfuse lists 200,000-amp and 300,000-amp AC interrupting values at 250VAC, as well as a separate 20,000-amp DC interrupting rating at 125VDC. The two AC values are provided without their individual test conditions in the supplied specifications, so the applicable rating should be confirmed against your current manufacturer documentation.

Key Features and Benefits

• 25 Amp Continuous Current Rating
• 250VAC Maximum Voltage Rating
• 125VDC Maximum Voltage Rating
• Class RK1 Fuse Classification
• Littelfuse POWR-PRO Family
• LLNRK Series Construction
• Slo-Blo Time-Delay Operation
• Dual-Element Protective Design
• Spring-Loaded Thermal Overload Element
• Current-Limiting Protection
• Reduced Unnecessary Fuse Opening
• Low-Resistance Design
• Non-Indicating Configuration

Technical Specifications

• Catalog Number: LLNRK025
  
• Manufacturer: Littelfuse
  
• Product Type: Current-Limiting Time-Delay Fuse
  
• Product Family: POWR-PRO
  
• Series: LLNRK
  
• Fuse Class: Class RK1
  
• Continuous Current Rating: 25 Amps
  
• Maximum AC Voltage: 250VAC
  
• Maximum DC Voltage: 125VDC
  
• Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
  
• Protective Construction: Dual Element
  
• Thermal Overload Element: Thermally Reversible, Spring-Loaded
  
• AC Interrupting Value 1: 200,000 Amps at 250VAC
  
• AC Interrupting Value 2: 300,000 Amps at 250VAC
  
• DC Interrupting Rating: 20,000 Amps at 125VDC
  
• Current-Limiting Design: Yes
  
• Indicating Feature: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Manufacturer-Identified Holder Series: LFR25030
  

Material Compliance and Certifications

The supplied product details do not identify the LLNRK025's exact body material, terminal material, or individual material-compliance declarations. Although the product is identified as Class RK1, the provided information does not specify individual UL or CSA certification markings or file numbers. 

Where It Works Best

• General-Purpose Electrical Circuits
• Motor Protection Applications
• Transformer Circuits
• Solenoid Circuits
• Fluorescent Lighting Circuits
• Equipment with High Inrush Currents
• Commercial Electrical Distribution
• Industrial Electrical Distribution
• Service Entrance Applications
• Compatible Class RK1 Fuse Holders
• Compatible Existing Class H Fuse Blocks
• LFR25030 Series Fuse Holders