JLLN500 - 500Amp Fuse

JLLN500 - 500Amp Fuse

The Littelfuse JLLN500 is a 500-amp Class T fuse with a clearly defined combination of electrical ratings and physical characteristics for compatible equipment. Instead of leaving you to identify a replacement by appearance alone, the JLLN500 gives you several concrete specifications to check: 500A continuous current, fast-acting operation, current-limiting design, 300VAC maximum voltage, 125VDC maximum voltage, and knife-blade/bolt-in construction. For equipment that requires this combination of Class T characteristics, the JLLN500 is a purpose-built electrical component designed to last when properly selected, installed, and operated within its stated ratings.

Key Features and Benefits

• 500A continuous current rating: Provides a clearly defined amperage specification for matching against equipment requirements.
• Class T fuse: Identifies the required fuse class at a glance and helps narrow the compatibility check.
• Fast-acting (F) opening: Littelfuse specifically designates the JLLN500 as fast-acting.
• Current-limiting design: The manufacturer states this fuse is current-limiting.
• 300VAC maximum voltage: Provides a specific AC voltage limit to verify against the intended application.
• 125VDC maximum voltage: Gives you a separate, clearly stated DC voltage specification.
• Knife-blade/bolt-in construction: An important physical characteristic when checking the fuse against existing equipment and mounting requirements.
• Non-indicating: The manufacturer specifies the JLLN500 as a non-indicating fuse.

Technical Specifications

• Manufacturer: Littelfuse
  
• Catalog Number: JLLN500
  
• Series: JLLN
  
• Manufacturer Description: FUS 300V F/A CLASS T 500A
  
• Continuous Current Rating: 500A
  
• Fuse Class: Class T
  
• Opening Characteristic: Fast-Acting (F)
  
• Family Style: Current Limiting
  
• Maximum AC Voltage: 300VAC
  
• Maximum DC Voltage: 125VDC
  
• AC Interrupting Rating: 200,000A (200 kA) at 300VAC
  
• DC Interrupting Rating: 20,000A (20 kA) at 125VDC
  
• Size / Construction: Knife-Blade/Bolt-In
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• PG Holder: LFT30600 Series
  

Material Compliance and Certifications

The manufacturer specifications supplied for the JLLN500 included no specific UL, CSA, CE, RoHS, REACH, or other certification or material-compliance information. That does not establish that the product lacks any particular approval or compliance status. When a specific certification or material requirement is necessary for the application, confirm it using current authoritative Littelfuse documentation and the markings on the fuse itself.

Where It Works Best

The Littelfuse JLLN500 500A Class T fuse is best suited to compatible electrical equipment that specifically calls for a 500A fast-acting, current-limiting Class T fuse with knife-blade/bolt-in construction. It is particularly straightforward to evaluate for maintenance or replacement situations where the existing equipment documentation identifies JLLN500 or specifies the same combination of amperage, fuse class, opening characteristic, voltage ratings, interrupting capacities, physical construction, and mounting requirements.