LLNRK012 - 12Amp Fuse

LLNRK012 - 12Amp Fuse

A blown fuse can stop equipment in its tracks. But when it's time to replace it, matching the amperage is only part of the job. You also need the right voltage rating, fuse class, interrupting capacity, and operating characteristics. The LLNRK012 Littelfuse POWR-PRO 12 Amp Time-Delay Fuse is designed for electrical systems that require a Class RK1 current-limiting fuse with dependable overload and short-circuit protection.

The LLNRK012 is intended for installation in compatible fuse blocks, clips, and holders. Littelfuse identifies the LFR25030 series as a suitable holder family, making it a useful reference when checking the physical arrangement of an existing electrical assembly. The fuse also has a non-indicating design, meaning it does not provide a built-in visual signal when the fuse has opened.

Key Features and Benefits

• 12 Amp Continuous Current Rating
• 250VAC Maximum Voltage Rating
• 125VDC Maximum Voltage Rating
• Class RK1 Fuse Classification
• Slo-Blo Time-Delay Operation
• Current-Limiting Protection
• Non-Indicating Design
• Overload Protection
• Short-Circuit Protection
• Existing Electrical System Maintenance
• Form, Fit, and Functional Replacement

Technical Specifications

• Catalog Number: LLNRK012
  
• Manufacturer: Littelfuse
  
• Product Type: Electrical Fuse
  
• Product Family: POWR-PRO
  
• Series: LLNRK
  
• Fuse Class: Class RK1
  
• Fuse Classification: Current-Limiting
  
• Continuous Current Rating: 12 Amps
  
• Maximum AC Voltage: 250VAC
  
• Maximum DC Voltage: 125VDC
  
• Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
  
• AC Interrupting Rating 1: 200,000 Amps at 250VAC
  
• AC Interrupting Rating 2: 300,000 Amps at 250VAC
  
• DC Interrupting Rating: 20,000 Amps at 125VDC
  
• Indicating Feature: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Manufacturer-Identified Holder Series: LFR25030
  

Material Compliance and Certifications

The LLNRK012 belongs to the Littelfuse POWR-PRO LLNRK family and is identified as a Class RK1 current-limiting, time-delay fuse. That classification helps establish the electrical and physical characteristics that must be considered when matching the fuse to an existing installation.

The supplied product information does not specify the fuse body's material composition or terminal materials. It also does not provide a complete list of individual UL, CSA, or other certification markings. Those details should be confirmed through the manufacturer's current product documentation and the markings on the actual fuse rather than assumed.

Where It Works Best

• Existing 12 Amp Fused Circuits
• Compatible Class RK1 Fuse Applications
• 250VAC Electrical Systems
• 125VDC Electrical Systems
• Time-Delay Fuse Replacement
• Current-Limiting Fuse Applications
• Service Entrance Circuits
• Main Circuit Protection
• Feeder Circuit Protection
• General-Purpose Branch Circuits
• Electrical Control Equipment