Bussmann KLU-1200 LIMITRON Fas...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3,138.24
$1,149.38
Bussmann KLU-1200 Eaton series KLU fuse, LIMITRON Fast-acting fuse, 1200 A, Class L, Non-indicating, Bolted blade end x bolted blade end, 5 sec at 500%, 200 kAIC at 600 Vac, Bolt, Standard, 1, 600 V

Bussmann KLU-1200 LIMITRON Fast-Acting Class L Fuse 1200A 600V with 200 kAIC Interrupt Rating

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Model: KLU-1200

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

$3,138.24
$1,149.38
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Bussmann KLU-1200 LIMITRON Fast-Acting Class L Fuse 1200A 600V with 200 kAIC Interrupt Rating

Professional High-Amperage Circuit Protection with Superior Interrupt Capacity

The Bussmann KLU-1200 LIMITRON fast-acting fuse delivers reliable 1200A circuit protection for demanding electrical applications. This Class L fuse features bolted blade end connections for secure installation and provides 600V voltage rating with exceptional 200 kAIC interrupt capacity at 600 Vac. The non-indicating design offers professional-grade protection with 5 second response time at 500% overload conditions.

Professional Features & Benefits

  • 1200A Amperage Rating: Handles high-current applications with reliable overcurrent protection for heavy-duty electrical systems.
  • 200 kAIC Interrupt Rating: Provides superior fault current interruption capability at 600 Vac for enhanced system safety and protection.
  • Class L Fast-Acting Design: Delivers rapid response to overcurrent conditions with 5 second clearing time at 500% overload for optimal circuit protection.
  • Bolted Blade End Connections: Ensures secure, reliable electrical connections with bolt mounting method for professional installations.
  • 600V Voltage Rating: Suitable for medium voltage applications with robust insulation and arc extinction capabilities.
  • RoHS Compliant Construction: Meets environmental compliance standards for responsible electrical component selection.
  • Compact Design: 2.5" x 2.5" x 1.75" dimensions provide space-efficient installation while maintaining 4.25 lb robust construction.

Technical Specifications

  • Amperage Rating: 1200 A
  • Class: Class L
  • Compliances: RoHS Compliant
  • Connection: Bolted blade end x bolted blade end
  • Department: Electrical
  • Fuse Indicator: Non-indicating
  • Interrupt Rating: 200 kAIC at 600 Vac
  • Mounting Method: Bolt
  • Packaging Type: Standard
  • Product Height: 1.75 in
  • Product Length Depth: 2.5 in
  • Product Weight: 4.25 lb
  • Product Width: 2.5 in
  • Quantity: 1
  • Response Time: 5 sec at 500%
  • Voltage Rating: 600 V

Professional Applications

  • Industrial Motor Control Centers and Distribution Panels
  • Commercial Building Electrical Systems
  • Manufacturing Facility Power Distribution
  • Heavy Equipment and Machinery Protection
  • Data Center and Critical Infrastructure
  • Utility and Substation Applications
  • Large HVAC System Protection

Why Choose Bussmann Quality?

Bussmann LIMITRON fuses provide proven reliability with RoHS compliant construction and professional-grade performance. The robust 4.25 lb design ensures durability in demanding applications, while the 200 kAIC interrupt rating delivers superior protection capabilities for critical electrical systems requiring dependable overcurrent protection.

Manufacturer Resources

Product Specs

Amperage Rating:
1200 A
Class:
Class L
Compliances:
RoHS Compliant
Connection:
Bolted blade end x bolted blade end
Fuse Indicator:
Non-indicating
Interrupt Rating:
200 kAIC at 600 Vac
Mounting Method:
Bolt
Packaging Type:
Standard
Product Height:
1.75 in
Product Length Depth:
2.5 in
Product Weight:
4.25 lb
Product Width:
2.5 in
Response Time:
5 sec at 500%
Voltage Rating:
600 V
Department:
Electrical
Item Quantity:
1
Product Type:
Fuse
Product Group:
Fuses
Product Subgroup:
Other Fuses

Bussmann KLU-1200 – Frequently Asked Questions

1) Can I use a KLU-1200 on a 480V or 208V service, or is it only for 600V?
600 V is the maximum, not a requirement. The KLU-1200 is rated 600 V, so it can be applied at 480 V, 240 V, or 208 V without issue. Its 200 kAIC interrupting rating is published at 600 Vac, which is the point that matters on a high fault-current service. Never apply it above 600 V.
2) Is a fast-acting Class L fuse like the KLU-1200 right for motor loads, or do I need a time-delay fuse?
Fast-acting is the wrong choice for motor starting. The KLU-1200 clears in 5 seconds at 500 percent of rating, which is a fast-acting characteristic aimed at mains, feeders, and switchboard protection where inrush is limited. A large motor drawing six times full load on start can push a fast-acting fuse to open on a normal start. For motor control centers with across-the-line starting, use a time-delay Class L fuse instead. Use the KLU-1200 where the load is a distribution feeder, a transformer primary or secondary main, or equipment that needs the fastest let-through on a fault.
3) Can I drop a Class L KLU-1200 into a switch that currently holds Class J or Class R fuses?
No. Class L is its own physical format, with bolted blade ends and a body size unique to the amp rating, and Class J and Class R fuses use ferrule or knife-blade ends in clips. They are not interchangeable in either direction. Class L also starts at 601 A, so any switch holding 600 A or less is not a Class L switch. Match the fuse class the switchgear is listed for.
4) Does the KLU-1200 show when it has blown?
No. It's a non-indicating fuse, so there is no pop-out pin or flag to tell you it has opened. On a 1200 A main, the practical check is a voltage reading across the fuse with the switch closed, or an ohm check with the switch open and locked out. If your maintenance crew needs a visual, spec a blown-fuse indicating device on the switch rather than expecting it from the fuse.
5) Am I buying one KLU-1200 fuse or a set of three?
One. The KLU-1200 ships as a single fuse in standard packaging. A three-phase switch takes three, so order in multiples of three if you are fusing a full three-pole disconnect, and most facilities keep at least one spare set on the shelf for a 1200 A main.
6) Is the Bussmann KLU-1200 RoHS compliant for a facility with environmental purchasing requirements?
Yes, the KLU-1200 is RoHS compliant, which is what most government, healthcare, and education procurement specs ask for on electrical components. That covers restricted substance content only; it says nothing about the fuse's electrical ratings, which are 1200 A, 600 V, 200 kAIC.
How fast can I get the Bussmann KLU-1200 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-1200 come with a warranty?
Absolutely. The Bussmann KLU-1200 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-1200?
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-1200 from ZenSupply?
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