KLLU1400 - 1400Amp Fuse

KLLU1400 - 1400Amp Fuse

At 1400 amps, choosing the right fuse means looking well beyond the current rating printed on the label. The KLLU1400 is a 1400A Class L time-delay, current-limiting fuse with bolt-in mounting, a maximum rating of 600VAC / 300VDC, and high interrupting capacity for demanding electrical systems. The manufacturer also identifies the KLLU Series as UL Listed and states that it meets or exceeds UL requirements for Class L fuses. When you're matching a KLLU1400 replacement, check the complete specification—1400A rating, Class L configuration, time-delay characteristics, voltage, interrupting capacity, and bolt-in mounting—not amperage alone.

Key Features and Benefits

• 1400A continuous current rating for electrical equipment specifically designed around a 1400-amp Class L fuse.
• Class L configuration provides a clearly defined fuse class for accurate equipment and replacement matching.
• Time-delay operation helps accommodate temporary high-current conditions rather than responding unnecessarily to normal startup current.
• The KLLU Series provides a minimum 10-second time delay at 500% of rated current, particularly useful where heavy motor starting or inductive-load currents are expected.
• 600VAC maximum AC rating makes the voltage requirement straightforward to verify against the equipment.
• Current-limiting performance is designed to reduce short-circuit damage to systems and equipment.
• Bolt-in construction gives installers and maintenance teams an important physical characteristic to confirm before replacement.
• Match the non-indicating design to the equipment configuration specified.

Technical Specifications

• Catalog Number: KLLU1400
  
• Manufacturer Description: FUS 600V T/D CLASS L 1400A
  
• Series: KLLU
  
• Product Type: Class L Time-Delay Current-Limiting Fuse
  
• Continuous Current Rating: 1400A
  
• Maximum AC Voltage: 600VAC
  
• Maximum DC Voltage: 300VDC
  
• AC Interrupting Rating: 200,000A at 600VAC
  
• DC Interrupting Rating: 20,000A at 300VDC
  
• Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
  
• Series Time-Delay Characteristic: Minimum 10 seconds at 500% of rated current
  
• Fuse Class: Class L
  
• Family Style: Current Limiting
  
• Construction / Size: Bolt-In
  
• Indicating: No
  
• Mounting Method: Bolt-In
  

Material Compliance and Certifications

The manufacturer identifies the KLLU Series as UL Listed and states that these fuses meet or exceed UL requirements for Class L fuses. The supplied KLLU1400 information also confirms its Class L designation, current-limiting family style, time-delay opening characteristic, electrical ratings, and bolt-in configuration.

Where It Works Best

The KLLU1400 best matches electrical equipment designed to use a 1400A Class L, time-delay, current-limiting fuse with bolt-in mounting. Its time-delay behavior is particularly relevant where the properly engineered circuit must tolerate temporary starting currents from large motors or other inductive loads. The manufacturer also identifies KLLU fuses for motor branch-circuit protection when sized and applied correctly.