JLLS1000 - 1000 Ampere Fuse

JLLS1000 - 1000 Ampere Fuse

At 1000 amps, choosing the right fuse is about more than matching the number on the label. The JLLS1000 is a Class T, fast-acting, current-limiting fuse rated for up to 600V AC and 300V DC. It uses a knife-blade/bolt-in configuration and can be mounted with the appropriate fuse block, clip, or holder. If you're replacing an existing fuse, check the entire specification—not just the 1000A rating. Fuse class, voltage, interrupting capacity, fast-acting operation, connection style, and mounting method should match the equipment's requirements.

Key Features and Benefits

• 1000A continuous current rating
• Class T fuse with a current-limiting design
• Fast-acting opening characteristic
• Rated for up to 600V AC
• Rated for up to 300V DC
• Knife-blade/bolt-in construction
• Non-indicating configuration
• Mounting method specified as fuse block, clip, or holder

Technical Specifications

• Catalog Number: JLLS1000
  
• Series: JLLS
  
• Product Type: Fuse
  
• Fuse Class: Class T
  
• Continuous Current Rating: 1000 A
  
• Maximum AC Voltage: 600 V AC
  
• Maximum DC Voltage: 300 V DC
  
• AC Interrupting Rating: 200,000 A (200 kA) at 600 V AC
  
• DC Interrupting Rating: 20,000 A (20 kA) at 300 V DC
  
• Opening: Fast-Acting (F)
  
• Family Style: Current Limiting
  
• Size / Construction: Knife-Blade/Bolt-In
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  

Material Compliance and Certifications

The supplied manufacturer information does not specify material-compliance declarations or certification listings for the JLLS1000. Because those details were not provided, do not assume UL, CSA, RoHS, or other certifications. Where a particular listing or compliance standard is required, verify it for the exact JLLS1000 catalog number.

Where It Works Best

The JLLS1000 fits equipment and circuits that require a 1000A, Class T, fast-acting, current-limiting fuse with knife-blade/bolt-in construction. For AC applications, its stated maximum voltage is 600V AC with a 200 kA interrupting rating. For DC applications, the corresponding specifications are 300V DC and 20 kA.

That AC/DC difference is easy to overlook, but it's an important part of selecting the correct fuse. Before using the JLLS1000 as a replacement, compare the existing fuse and equipment requirements for amperage, voltage, Class T designation, interrupting rating, fast-acting characteristic, mounting method, and connection style. Matching those details gives the buyer much more useful information than simply seeing "1000A fuse" repeated throughout the page.