Littelfuse KLLU1500 Class L Fuse – 1500A – 600V Time-Delay Fuse

The Littelfuse KLLU1500 is a 1500 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 serving as a cost-effective alternative to the premium POWR-PRO™ KLPC series. Its time-delay characteristics allow it to withstand temporary motor starting and transformer inrush currents without nuisance operation, making it ideal for demanding electrical applications.

Electrical Rating

• Current Rating: 1500 Amps
• Maximum AC Voltage: 600 VAC
• Maximum DC Voltage: 300 VDC
• Interrupting Rating:
  • 200 kA AC @ 600 VAC

Key Specifications

• Manufacturer: Littelfuse
• Catalog Number: KLLU1500
• 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 equipment damage during short-circuit conditions
• High 200 kA interrupting capacity for superior fault protection
• Provides excellent branch circuit, motor, and control equipment protection
• Selective coordination with other Class L and Littelfuse current-limiting fuses
• Helps minimize downtime by isolating only the faulted circuit

Construction Features

• Heavy-duty bolt-in Class L construction
• UL Listed design meeting or exceeding Class L requirements
• Industrial-grade construction for demanding applications
• Cost-effective alternative to POWR-PRO™ KLPC series fuses
• Non-indicating configuration

Mounting & Compatibility

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

Applications

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

Product Data

• Manufacturer: Littelfuse
• Catalog Number: KLLU1500
• 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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