Bussmann KAX-12 Semiconductor ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$170.21
$160.29
Bussmann KAX-12 Eaton series KAX semiconductor fuse, 1000 Vdc, Non Indicating type, Standard

Bussmann KAX-12 Semiconductor Fuse, 1000 Vdc, Non Indicating

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Model: KAX-12
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$170.21
$160.29
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Bussmann KAX-12 Semiconductor Fuse, 1000 Vdc, Non Indicating

The Bussmann KAX-12 is part of the Eaton Bussmann series KAX semiconductor fuse line, engineered to protect sensitive power semiconductor devices from damaging overcurrent conditions. Rated 1000 Vdc, this Non Indicating, Standard type fuse is purpose-built for demanding DC power circuits where fast, current-limiting interruption is critical to equipment survival. Semiconductor fuses like the KAX-12 are designed to clear high fault currents faster than conventional fuses, helping shield costly power semiconductor components from thermal and mechanical stress. The KAX-12 delivers dependable overcurrent protection for semiconductor-based equipment used in industrial and commercial power systems where 1000 Vdc circuit protection is required.

Key Features

  • Voltage Rating: 1000 Vdc, suited for protection of high-voltage DC circuits and connected semiconductor devices.
  • Fuse Series: Eaton Bussmann series KAX semiconductor fuse, model KAX-12, engineered for consistent current-limiting performance.
  • Indication Type: Non Indicating design, providing standard overcurrent protection without a built-in blown-fuse indicator.
  • Construction: Standard type semiconductor fuse body built for reliable, repeatable interruption performance in DC applications.
  • Compact Footprint: Measures 2 in in height with a .56 in width and .56 in length depth, suited for space-constrained enclosures and fuse blocks.
  • Lightweight Design: Weighs approximately .47 lb, simplifying handling, stocking, and installation in the field.
  • Semiconductor Protection Function: Designed specifically to safeguard power semiconductor devices rather than general branch-circuit wiring.

Technical Specifications

  • Compliances: Contact factory
  • Product Height: 2 in
  • Product Length Depth: .56 in
  • Product Weight: .47 lb
  • Product Width: .56 in

Typical Applications

  • Protection of Power Semiconductor Devices such as SCRs, Diodes, and Thyristors
  • DC Power Conversion and Rectifier Circuits
  • Industrial Drives and Motor Control Systems
  • Power Electronics and Converter Equipment
  • Panel and Switchgear Overcurrent Protection
  • Renewable Energy and DC Power Distribution Systems

Why Bussmann?

Eaton Bussmann is a recognized leader in circuit protection, and the KAX series semiconductor fuse line reflects that engineering standard with a Standard construction built for consistent, reliable overcurrent interruption. Semiconductor fuses carry tight design tolerances because the components they protect are both expensive and sensitive to fault energy, and the Bussmann name is widely specified by electrical professionals for exactly this kind of demanding protection role. Choosing the Bussmann KAX-12 gives electrical professionals and panel builders a dependable component for protecting critical semiconductor equipment in demanding 1000 Vdc applications, backed by the Eaton Bussmann engineering reputation.

Manufacturer Resources

Spec Sheet

Product Specs

Compliances:
Contact factory
Fuse Indicator:
Non Indicating
Packaging Type:
Standard
Product Height:
2 in
Product Length Depth:
.56 in
Product Weight:
.47 lb
Product Width:
.56 in
Voltage Rating:
1000 Vdc
Department:
Electrical
Product Type:
Semiconductor Fuse
Product Group:
Circuit Protection
Product Subgroup:
Fuses
Product Length:
0.56 in

Bussmann KAX-12 – Frequently Asked Questions

1) Can I use the Bussmann KAX-12 to protect SCRs and diodes in a DC drive?
That is exactly what the KAX-12 is built for. It is a semiconductor fuse from the Eaton Bussmann KAX series, rated 1000 Vdc, intended to protect power semiconductor devices such as SCRs, diodes and thyristors in DC power conversion, rectifier, drive and converter circuits. It clears high fault currents fast enough to limit the energy that reaches the semiconductor, which a general purpose branch circuit fuse will not do.
2) Is the KAX-12 fuse rated for AC circuits or DC only?
The rating published on the KAX-12 is 1000 Vdc, so specify it for DC circuits at or below 1000 volts. If your application is an AC feeder or branch circuit, this is the wrong class of fuse; pick a fuse with a stated AC voltage rating instead.
3) Will a KAX-12 fit in my fuse block? What are its dimensions?
The KAX-12 body measures 2 in in height with .56 in width and .56 in length/depth, and weighs about .47 lb. That square .56 in cross section and 2 in length is what you check against the clip spacing or block opening in a tight enclosure before committing.
4) Can I use a semiconductor fuse like the KAX-12 as branch circuit protection in a panel?
No, and it is a common mistake. Semiconductor fuses are designed to safeguard power semiconductor devices rather than general branch circuit wiring, so the KAX-12 is a component level protective device for the rectifier, converter or drive section, not a substitute for branch circuit or feeder protection. Keep a listed branch circuit fuse or breaker upstream and use the KAX-12 at the semiconductor.
5) Does the KAX-12 have a blown fuse indicator or microswitch?
No. The KAX-12 is the Non Indicating version, so there is no built in blown fuse indicator and nothing to drive a remote trip or alarm contact. If your panel relies on visual or electrical indication of a cleared fuse, you need an indicating style fuse or a separate monitoring device.
6) What is the exact part number to order this Bussmann semiconductor fuse?
Order it as Bussmann KAX-12, from the Eaton Bussmann KAX semiconductor fuse series. That is the manufacturer part number as marked, and it identifies the 1000 Vdc, Non Indicating, Standard construction version.
7) How does the KAX-12 come packaged for stocking?
The KAX-12 ships in Standard packaging, single fuse handling, at roughly .47 lb each. For MRO stocking it is a straightforward shelf item in a panel spares kit alongside the drive or rectifier it protects.
How fast can I get the Bussmann KAX-12 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 KAX-12 come with a warranty?
Absolutely. The Bussmann KAX-12 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 KAX-12?
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 KAX-12 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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