Littelfuse KLPC1000 Class L Fuse – 1000A – 600V Time-Delay POWR-PRO™ Fuse

The Littelfuse KLPC1000 is a 1000 Amp Class L time-delay fuse designed for superior overcurrent and short-circuit protection in high-capacity industrial and commercial power distribution systems. Part of the specification-grade POWR-PRO™ KLPC series, this fuse is engineered to meet or exceed the most demanding project specifications through premium construction and industry-leading performance.

KLPC series fuses utilize 99.9% pure silver fuse links, silver-plated copper end bells, glass-reinforced melamine bodies, O-ring seals, and granular quartz fillers to provide exceptional reliability, current limitation, and service life. They are the only UL Listed Class L fuses that provide a minimum of 10 seconds time delay at 500% of rated current while maintaining current-limiting performance comparable to the fastest Class L fuses available.

Electrical Rating

• Current Rating: 1000 Amps
• Maximum AC Voltage: 600 VAC
• Maximum DC Voltage: 480 VDC
• Interrupting Rating:
  • 200 kA AC
  • 20 kA DC @ 480 VDC

Key Specifications

• Manufacturer: Littelfuse
• Catalog Number: KLPC1000
• Series: KLPC
• Fuse Class: Class L
• Construction Type: Bolt-In
• Fuse Type: Time-Delay (Slo-Blo)
• Family: POWR-PRO™ Fuse
• Indicating: No

Protection Characteristics

• Minimum 10-second time delay at 500% rated current
• Accommodates motor starting currents and transformer inrush loads
• Advanced current-limiting design reduces fault energy and equipment damage
• Peak let-through currents approximately 10% lower than typical time-delay Class L fuses
• High interrupting capacity for superior fault protection
• Protects feeders, motors, transformers, and power distribution equipment
• Supports selective coordination in complex electrical systems

Construction Features

• 99.9% pure silver fuse elements
• Silver-plated copper end bells
• Glass-reinforced melamine body construction
• O-ring seals between body and end bells
• Granular quartz filler for enhanced arc suppression
• Heavy-duty bolt-in Class L design
• Non-indicating configuration

Features & Benefits

• Specification-grade performance for critical applications
• Current-limiting protection minimizes short-circuit damage
• Excellent coordination with downstream protective devices
• Long equipment life through reduced thermal and mechanical stress
• Reliable operation in demanding industrial environments
• Meets or exceeds stringent project and UL Class L requirements

Mounting & Compatibility

• Mounting Method: Bolt-In
• Compatible with Class L fuse clips and mounting hardware
• Suitable for switchgear, switchboards, service entrances, and large distribution systems

Applications

• Main service entrance protection
• Large feeder circuits
• Industrial power distribution systems
• Motor control centers (MCCs)
• Transformers and large inductive loads
• Utility and commercial electrical systems
• Critical infrastructure applications requiring specification-grade protection

Product Data

• Manufacturer: Littelfuse
• Catalog Number: KLPC1000
• Product Type: Time-Delay Current-Limiting Fuse
• Series: KLPC
• Fuse Class: Class L
• Family: POWR-PRO™ Fuse