JLLS250 - 250Amp Fuse

JLLS250 - 250Amp Fuse

The JLLS250 is a 250-amp Class T fast-acting fuse designed for your demanding electrical applications where high interrupting capacity, current limitation, and a compact fuse configuration matter. Rated up to 600VAC and 300VDC, the JLLS250 delivers a 200 kA AC interrupting rating and a 20 kA interrupting rating at 300VDC. For maintenance professionals replacing an existing JLLS250—or engineers working with equipment that specifically calls for a 250A, 600V Class T fuse—this model provides clearly defined electrical characteristics in a space-efficient package.

Key Features and Benefits

• 250A continuous current rating for equipment and circuits engineered for 250-amp Class T protection.
• Rated for systems up to 600VAC and 300VDC.
• Fast-acting (F) opening characteristic operates without an intentional time delay.
• The current-limiting design helps restrict the amount of fault current passing through the circuit during applicable overcurrent events.
• Class T fuse configuration combines high interrupting capacity with a compact physical format.
• Knife-blade/bolt-in construction provides the required mechanical configuration for compatible mounting hardware.
• Non-indicating fuse for applications that do not require a visual blown-fuse indicator.
• Installs using the appropriate fuse block, clip, or holder.

Technical Specifications

• Catalog Number: JLLS250
  
• Series: JLLS
  
• Product Type: Class T Fuse
  
• Continuous Current Rating: 250A
  
• Maximum AC Voltage: 600VAC
  
• Maximum DC Voltage: 300VDC
  
• AC Interrupting Rating: 200 kA
  
• DC Interrupting Rating: 20 kA at 300VDC
  
• Opening Characteristic: Fast-Acting (F)
  
• Fuse Class: Class T
  
• Family Style: Current Limiting
  
• Construction / Size: Knife-Blade / Bolt-In
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Specified Holder Series: LFT60400 Series
  

Material Compliance and Certifications

The JLLS250 is part of the JLLS family of Class T, fast-acting, current-limiting fuses. The supplied product specifications clearly establish its fuse class, electrical ratings, opening characteristic, mounting configuration, and interrupting capacities.

Where It Works Best

The JLLS250 250A Class T fuse is best suited to commercial and industrial electrical equipment specifically designed around 250A Class T overcurrent protection. It can be a practical fit for compatible power distribution equipment, disconnects, panels, industrial electrical systems, and other applications that require a fast-acting, current-limiting fuse rated up to 600VAC.