JLLN450 - 450Amp Fuse

JLLN450 - 450Amp Fuse

When you're matching a 450-amp fuse to existing equipment, the useful question isn't simply whether the amperage is correct. The Littelfuse JLLN450 brings together a specific set of characteristics: a 450A continuous current rating, Class T configuration, fast-acting opening, current-limiting design, and knife-blade/bolt-in construction. For maintenance or replacement applications that require these exact characteristics, the JLLN450 provides a straightforward specification set to verify before installation. It's a focused electrical component built to last when properly selected, installed, and operated within its stated ratings.

Key Features and Benefits

• 450A continuous current rating: Provides a precise amperage specification to compare with equipment requirements.
• Class T configuration: Clearly identifies the fuse class for easier compatibility checking.
• Fast-acting (F): Littelfuse specifies the JLLN450 with a fast-acting opening characteristic.
• Current-limiting design: The manufacturer identifies Current Limiting as the fuse's family style.
• 300VAC maximum rating: Supports applications requiring this specified AC voltage rating, subject to the equipment requirements.
• 125VDC maximum rating: Provides a separately defined DC voltage rating for compatible DC applications.
• Knife-blade/bolt-in construction: Provides another important physical characteristic to check when confirming fit and compatibility.
• Non-indicating design: The manufacturer specifies the JLLN450 as non-indicating.

Technical Specifications

• Manufacturer: Littelfuse
  
• Catalog Number: JLLN450
  
• Series: JLLN
  
• Manufacturer Description: FUS 300V F/A CLASS T 450A
  
• Continuous Current Rating: 450A
  
• 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 information supplied for the JLLN450 did not include specific UL, CSA, CE, RoHS, REACH, or other material-compliance or certification information. This should not be interpreted to mean the fuse does not carry a particular certification or compliance status. If an approval or material requirement is important for your application, verify it against current authoritative Littelfuse documentation and the markings on the actual fuse.

Where It Works Best

The Littelfuse JLLN450 450A Class T fuse is best suited to compatible electrical equipment that specifically requires a 450A, fast-acting, current-limiting Class T fuse with knife-blade/bolt-in construction. It is especially straightforward to evaluate when existing equipment specifications call for JLLN450 or the same combination of fuse class, amperage, physical configuration, and applicable electrical ratings.