LLSRK012ID - 12Amp Fuse

LLSRK012ID - 12Amp Fuse

A blown fuse is a small component that can cause a surprisingly big headache. Equipment stops, maintenance gets called, and someone suddenly spends valuable time figuring out which fuse opened and why. The Littelfuse LLSRK012ID 12 Amp Class RK1 time-delay indicating fuse makes that situation easier to manage. With its built-in blown-fuse indicator, high interrupting capacity, and time-delay protection, it offers several practical advantages for industrial and commercial electrical systems.

Part of the Littelfuse POWR-PRO LLSRK_ID series, this industrial cartridge fuse features patented Indicator™ technology. When your fuse opens, a small indicator window darkens, giving maintenance technicians a clear visual cue about which fuse needs attention. It's a simple feature, but anyone who has spent time checking multiple fuses inside a control panel can appreciate the difference.

Key Features and Benefits

• 12-amp continuous current rating
• Class RK1 current-limiting protection
• Built-in Littelfuse Indicator™ technology
• Darkening blown-fuse indicator window
• Time-delay operating characteristics
• Reduced nuisance fuse openings
• High short-circuit interrupting capacity
• Precision-formed short-circuit elements
• Solid-state overload section
• No moving parts in the overload mechanism

Technical Specifications

• Manufacturer: Littelfuse
  
• Catalog Number: LLSRK012ID
  
• Series: LLSRK_ID
  
• Product Family: POWR-PRO
  
• Product Type: Industrial Cartridge Fuse
  
• Fuse Class: Class RK1
  
• Continuous Current Rating: 12A
  
• Maximum AC Voltage: 600V AC
  
• Maximum DC Voltage: 300V DC
  
• Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
  
• Blown-Fuse Indication: Yes
  
• Indicator Technology: Littelfuse Indicator™
  
• AC Interrupting Rating: 200,000A at 600V AC
  
• Additional AC Interrupting Rating: 300,000A at 600V AC, subject to applicable manufacturer rating conditions
  
• DC Interrupting Rating: 20,000A at 300V DC
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Associated Fuse Holder Series: LFR60030
  
• Short-Circuit Elements: Precision-Formed
  
• Overload Section: Solid-State, No Moving Parts
  

Material Compliance and Certifications

The supplied manufacturer specifications did not include specific UL and CSA certification details, RoHS and REACH compliance declarations, or complete material composition information. For installations requiring documented certifications or material compliance, verify the applicable information directly against current Littelfuse documentation for catalog number LLSRK012ID.

Where It Works Best

• Industrial Control Panels
• Motor Control Circuits
• Manufacturing Machinery
• Commercial Electrical Systems
• Industrial Electrical Distribution
• Equipment With Temporary Startup Surges
• Low-Amperage Industrial Circuits
• Electrical Maintenance Applications
• Machinery Protection Circuits
• Compatible Class RK1 Fuse Blocks
• LFR60030 Series Fuse Holders