Littelfuse KLLU2000 Class L Fuse – 2000A – 600V Time-Delay Fuse

The Littelfuse KLLU2000 is a 2000 Amp Class L time-delay fuse designed for high-capacity industrial and commercial power distribution systems. Part of the KLLU series, this UL Listed fuse provides reliable overload and short-circuit protection while offering a cost-effective alternative to the POWR-PRO™ KLPC series. Its time-delay characteristics allow temporary motor starting currents and transformer inrush currents to pass without nuisance operation, making it ideal for heavy-duty electrical applications.

KLLU series fuses meet or exceed all UL requirements for Class L fuses and provide dependable protection for feeders, motors, switchgear, and large distribution systems.

Electrical Rating

• Current Rating: 2000 Amps
• Maximum AC Voltage: 600 VAC
• Interrupting Rating:
  • 200 kA AC @ 600 VAC

Key Specifications

• Manufacturer: Littelfuse
• Catalog Number: KLLU2000
• Series: KLLU
• Fuse Class: Class L
• Construction Type: Bolt-In
• Fuse Type: Time-Delay (Slo-Blo)
• Family: Current-Limiting Fuse
• Indicating: No

Protection Characteristics

• Minimum 10-second time delay at 500% of rated current
• Accommodates motor starting currents and transformer inrush loads
• Current-limiting design reduces short-circuit damage to equipment and systems
• High 200 kA interrupting rating provides superior fault protection
• Protects branch circuit conductors, motor control equipment, and motors
• Supports selective coordination with other Class L and Littelfuse current-limiting fuses
• Reduces downtime by isolating only the faulted circuit

Construction Features

• Heavy-duty bolt-in Class L fuse construction
• UL Listed and compliant with Class L fuse requirements
• Industrial-grade design for demanding electrical environments
• Cost-effective alternative to specification-grade POWR-PRO™ KLPC fuses
• Non-indicating configuration

Features & Benefits

• Current-limiting protection minimizes equipment damage during fault conditions
• Easily coordinated with other system protective devices
• 200 kA AC interrupting rating helps meet current and future system requirements
• Time-current characteristics closely match many circuit breaker curves
• Suitable for a wide range of breaker settings compared to fast-acting Class L fuses
• Helps improve equipment life and system reliability

Mounting & Compatibility

• Mounting Method: Bolt-In
• Compatible with Class L fuse clips, fuse blocks, and mounting hardware
• Suitable for switchboards, switchgear, distribution equipment, and feeder circuits

Applications

• Main service protection
• Feeder circuit protection
• Large motor circuits
• Transformer protection
• Industrial switchgear and switchboards
• Commercial and industrial power distribution systems
• Selectively coordinated electrical systems

Product Data

• Manufacturer: Littelfuse
• Catalog Number: KLLU2000
• Product Type: Time-Delay Current-Limiting Fuse
• Series: KLLU
• Fuse Class: Class L
• Family: Current-Limiting Fuse

Returns are easy

You may return items within 30 days of delivery for a refund.

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