KLLU3500 - 3500Amp Fuse

KLLU3500 - 3500Amp Fuse

The KLLU3500 is a 3500A Class L time-delay, current-limiting fuse for electrical equipment that requires high-current overcurrent protection in a bolt-in configuration. The manufacturer 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 KLLU3500 to an existing installation, don't stop at the 3500A rating—also verify the fuse class, voltage, interrupting rating, time-delay characteristics, bolt-in mounting, and equipment specifications.

Key Features and Benefits

• 3500A continuous current rating for equipment specifically designed around a 3500-amp Class L fuse.
• Class L fuse design provides a clearly defined electrical and physical format for application and replacement matching.
• Time-delay operation helps accommodate temporary high-current conditions rather than treating every startup surge like a sustained overcurrent.
• Manufacturer specifies a minimum 10-second time delay at 500% of rated current.
• Bolt-in construction gives installers a specific mounting arrangement to confirm against the existing equipment.
• Non-indicating configuration for installations calling for this fuse type.

Technical Specifications

• Catalog Number: KLLU3500
  
• Manufacturer Description: FUS 600V T/D CLASS L 3500A
  
• Series: KLLU
  
• Product Type: Time-Delay Current-Limiting Fuse
  
• Continuous Current Rating: 3500A
  
• 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 KLLU3500 specifications also establish its Class L designation, time-delay opening characteristic, current-limiting family style, and electrical ratings.

Where It Works Best

The KLLU3500 3500A fuse best matches electrical equipment designed for a 3500A Class L, time-delay, current-limiting fuse with bolt-in mounting. The manufacturer identifies motor branch-circuit protection as a KLLU Series application, and the fuse's minimum 10-second time delay at 500% of rating is intended to accommodate the heavy starting currents found with large motors and other inductive loads. When properly applied, its current-limiting characteristic helps reduce short-circuit damage.