Bussmann KLU Series LIMITRON F...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,650.54
Bussmann KLU Series LIMITRON Fast-Acting Class L Fuse

Bussmann KLU Series LIMITRON Fast-Acting Class L Fuse

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Model: KLU-1500

In Stock (leaves warehouse same day if ordered before 3pm ET)

$2,650.54
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Bussmann KLU Series LIMITRON Fast-Acting Class L Fuse

The Bussmann KLU Series LIMITRON Fast-Acting Class L Fuse from Eaton Bussmann delivers dependable overcurrent protection for high-amperage industrial and commercial power distribution systems, available in amperage ratings from 1500A to 4000A. Built with a bolted blade end x bolted blade end configuration, this non-indicating, fast-acting Class L fuse carries a 600V voltage rating and a 200 kAIC interrupt rating at 600 Vac. Each fuse in the KLU series is designed to open in 5 seconds at 500% of rated current, providing predictable, code-compliant protection for demanding electrical systems.

Key Features

  • Amperage Range: Available in 1500A and 4000A ratings to match high-capacity feeder and service entrance protection needs.
  • Class L Construction: Bolted blade end x bolted blade end design delivers a secure, low-resistance connection in high-amperage fuse blocks.
  • Fast-Acting LIMITRON Design: Non-indicating, fast-acting fuse element responds quickly to fault currents for improved equipment protection.
  • High Interrupt Rating: 200 kAIC at 600 Vac ensures safe interruption of high fault currents in demanding power systems.
  • Time-Delay Characteristic: Opens in 5 seconds at 500% of rated current for predictable overcurrent response.
  • Voltage Rating: Rated 600V for use in industrial and commercial electrical distribution equipment.
  • Standard Bolt Mounting: Bolt-style, standard mounting simplifies installation into compatible Class L fuse blocks and switches.

Certifications & Compliance

  • RoHS Compliant

Technical Specifications

  • Voltage Rating: 600V
  • Item Quantity: 1
  • Compliances: RoHS Compliant

Typical Applications

  • Industrial and Commercial Power Distribution
  • Panelboard and Switchboard Overcurrent Protection
  • Motor Control Center Circuit Protection
  • Service Entrance and Feeder Protection
  • High-Amperage Fuse Block Applications
  • Renovation and New Construction Electrical Upgrades

Why Bussmann?

Bussmann by Eaton is a recognized leader in circuit protection, and the KLU Series LIMITRON fuse reflects that engineering standard with its Class L bolted blade construction and 200 kAIC interrupt rating at 600 Vac. The RoHS-compliant design supports environmentally responsible installations without compromising performance. For electricians and engineers specifying high-amperage overcurrent protection, the Bussmann KLU Series delivers the reliability that code-driven electrical work demands.

Manufacturer Resources

Product Specs

Connection:
Bolted blade end x bolted blade end
Class:
Class L
Response Time:
5 sec at 500%
Mounting Method:
Bolt
Fuse Indicator:
Non-indicating
Interrupt Rating:
200 kAIC at 600 Vac
Voltage Rating:
600V
Item Quantity:
1
Compliances:
RoHS Compliant
Packaging Type:
Standard
Department:
Electrical
Product Type:
Fuse
Amperage Rating:
1500A - 4000A
Connection Type:
Bolted Blade
Standards:
RoHS Compliant
Product Group:
Fuses
Product Subgroup:
Other Fuses

Bussmann KLU-1500 – Frequently Asked Questions

1) What amp ratings does the Bussmann KLU LIMITRON Class L fuse come in?
The KLU LIMITRON is ordered by amp rating, and the full run is 601A, 650A, 700A, 1000A, 1500A, 1600A, 1800A, 2000A, 2500A, 3000A and 4000A. Part numbers follow the amperage directly: KLU-601 through KLU-4000. Each is sold as a single fuse, not a set of three, so a three-phase switch needs three pieces.
2) Will a KLU fuse fit my existing Class L fuse holder?
Yes, if the holder is Class L rated at the same amperage. The KLU uses a bolted blade end x bolted blade end body with standard bolt mounting, which is the Class L mounting arrangement, so it lands in Class L blocks and bolt-in switches of the matching amp rating. Class L bodies change length as the amperage goes up, so the holder has to be sized for the same amp class as the fuse you order.
3) Is the KLU a fast-acting fuse or a time-delay fuse for motor loads?
The KLU LIMITRON is a fast-acting Class L fuse. Its published opening characteristic is 5 seconds at 500% of rated current, which gives it enough of a short-time hold to ride through ordinary inrush on a feeder while still clearing faults quickly. For a large motor circuit with a long accelerating period, a true time-delay Class L is the better choice; the KLU is aimed at feeder, service entrance and switchboard mains protection.
4) Can I swap a KLU into a panel that currently has a different Class L fuse?
Physically yes, as long as the replacement is the same amp rating, since all Class L fuses of a given amperage share the bolted blade mounting dimensions. The thing to watch is the characteristic: the KLU is a fast-acting LIMITRON rather than a time-delay Class L, so if the existing fuse was a time-delay type protecting a motor or transformer load, dropping in a fast-acting fuse can cause nuisance openings on inrush.
5) Does the KLU fuse have a blown fuse indicator?
No. The KLU is non-indicating, so there is no pop-out pin or visual flag to tell you it has opened. On a blown fuse you will be checking it with a meter or looking for an open circuit rather than spotting an indicator through the switch window. If your maintenance procedure depends on a visible indication, plan for testing instead.
6) Why does the amp range start at 601A instead of 600A?
That is how Class L is defined. Class L fuses cover 601 through 6000 amps at 600 volts; at 600 amps and below you are in Class J, RK1 or RK5 territory with a different body and mounting. So the smallest KLU is the KLU-601, and anything at or under 600A needs a different fuse class and holder entirely.
7) What do I need besides the fuse itself for a high-amperage Class L installation?
The KLU ships as one fuse with no mounting hardware implied beyond its own bolted blade ends, so the Class L fuse block or bolted pressure switch and the bolts and torque hardware for those blade connections come from the gear, not the fuse. A three-phase installation takes three fuses of the same amp rating, ordered individually.
8) Are Bussmann KLU fuses RoHS compliant for a spec that requires it?
Yes, the KLU LIMITRON is RoHS compliant, which is the compliance point listed for the series. That covers restricted substance language common in institutional and government electrical specs.
How fast can I get the Bussmann KLU-1500 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Bussmann KLU-1500 come with a warranty?
Absolutely. The Bussmann KLU-1500 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Bussmann KLU-1500?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Bussmann KLU-1500 from ZenSupply?
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