LLSRK350ID - 350Amp Fuse

LLSRK350ID - 350Amp Fuse

When your industrial equipment shuts down unexpectedly, every minute spent troubleshooting costs production time. Finding a blown fuse shouldn't add to the headache. That's where the Littelfuse LLSRK350ID 350A Class RK1 time-delay indicating fuse comes in.

Part of the Littelfuse POWR-PRO LLSRK_ID series, this 350-amp fuse is rated for 600V AC and 300V DC applications. It features precision-formed short-circuit elements to limit fault current, along with a solid-state overload section with no moving parts. That means no spring-loaded overload mechanism to wear out over repeated operating cycles.

Key Features and Benefits

• Built-in blown-fuse indicator
• 350-amp continuous current rating
• Class RK1 current-limiting protection
• Time-delay operation for temporary current surges
• Helps reduce nuisance fuse openings
• Precision-formed short-circuit elements
• Solid-state overload section with no moving parts
• High AC and DC interrupting ratings
• Knife-blade terminal configuration
• Suitable for a variety of industrial applications
• Potential to simplify fuse inventory

Technical Specifications

• Manufacturer: Littelfuse
  
• Catalog Number: LLSRK350ID
  
• Series: LLSRK_ID
  
• Product Family: POWR-PRO Fuse
  
• Fuse Class: Class RK1
  
• Continuous Current Rating: 350A
  
• Maximum AC Voltage: 600V AC
  
• Maximum DC Voltage: 300V DC
  
• Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
  
• Terminal Style: Knife-Blade
  
• Blown-Fuse Indicator: Yes
  
• 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 Holder Series: LFR60400 Series
  
• Short-Circuit Elements: Precision-Formed
  
• Overload Section: Solid-State, No Moving Parts
  

Material Compliance and Certifications

The Littelfuse LLSRK350ID is part of the POWR-PRO Class RK1 fuse family. Its construction includes precision-formed short-circuit elements, a solid-state overload section, and Littelfuse's patented indicating technology.

The manufacturer's supplied specifications confirm the fuse's electrical ratings, opening characteristics, and general construction features. However, the manufacturer did not provide specific UL or CSA certification details, RoHS and REACH compliance declarations, or material composition information.

Where It Works Best

• Industrial Motor Circuits
• Manufacturing and Production Equipment
• Industrial Control Panels
• Commercial Electrical Distribution Systems
• Industrial Machinery With Frequent Startups
• Maintenance-Intensive Facilities
• High-Capacity Fuse-Protected Circuits
• Compatible Fuse Blocks and Holders