JLLN600 - 600Amp Fuse

JLLN600 - 600Amp Fuse

The Littelfuse JLLN600 is a 600-amp Class T fuse with the specific electrical and physical characteristics you need to check when matching a fuse to compatible equipment. Littelfuse identifies the JLLN600 as fast-acting and current-limiting, with maximum voltage ratings of 300VAC and 125VDC. If your equipment documentation calls for JLLN600—or for this exact combination of Class T, 600A, voltage, interrupting, opening, and mounting characteristics—you have a straightforward set of specifications to work from. Properly selected, installed, and operated within those ratings, it's an electrical component built to last without relying on vague performance claims.

Key Features and Benefits

• 600A continuous current rating: Provides an exact amperage specification to match against electrical equipment requirements.
• Class T configuration: Clearly identifies the fuse class for a more precise compatibility check.
• Fast-acting (F): Littelfuse specifies the JLLN600 with a fast-acting opening characteristic.
• Current limiting: The manufacturer's stated family style, providing another important specification for matching the fuse to the intended application.
• 300VAC maximum rating: Suitable for applications that require this Class T fuse configuration at voltages within its stated AC rating.
• 125VDC maximum rating: Provides a separate DC voltage specification for equipment designed around the corresponding rating.
• Knife-blade/bolt-in construction: Helps distinguish the JLLN600 when physical configuration is part of the equipment compatibility requirements.
• Non-indicating design: Littelfuse specifies this model as non-indicating.

Technical Specifications

• Manufacturer: Littelfuse
  
• Catalog Number: JLLN600
  
• Series: JLLN
  
• Manufacturer Description: FUS 300V F/A CLASS T 600A
  
• Continuous Current Rating: 600A
  
• 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 supplied manufacturer specifications do not state specific UL, CSA, CE, RoHS, REACH, or other certification or material-compliance information for the JLLN600. This should not be interpreted as meaning the fuse lacks a particular certification or compliance status. If your installation requires an approval or material standard, verify it against current authoritative Littelfuse documentation and the markings on the actual fuse.

Where It Works Best

The Littelfuse JLLN600 600A Class T fuse is best suited to compatible electrical equipment that specifically requires a 600A, fast-acting, current-limiting Class T fuse with knife-blade/bolt-in construction. It is especially easy to evaluate when you're replacing an existing JLLN600 or working from equipment documentation that provides the required fuse class, current rating, voltage, interrupting capacity, and mounting configuration.