Bussmann KWN-R Series LIMITRON...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$173.69
Bussmann KWN-R Series LIMITRON Fast-Acting Class RK1 Fuse, Non-Indicating

Bussmann KWN-R Series LIMITRON Fast-Acting Class RK1 Fuse, Non-Indicating

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Model: KWN-R-10

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

$173.69
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Bussmann KWN-R Series LIMITRON Fast-Acting Class RK1 Fuse, Non-Indicating

The Bussmann KWN-R Series from Eaton Bussmann is a LIMITRON fast-acting fuse line built to Class RK1 specifications, offered in a non-indicating, standard configuration for general-purpose overcurrent protection. This series is available in amp ratings from 1A to 60A, spanning 1A, 3A, 6A, 10A, 15A, 20A, 25A, 30A, 40A, 50A, and 60A options so electricians and facility teams can match the correct fuse to a given branch-circuit or equipment protection requirement. As a Class RK1 fuse, the KWN-R Series is engineered for fast-acting response and current-limiting performance, helping protect conductors, equipment, and connected loads in commercial and industrial electrical systems. The standard, non-indicating design keeps the fuse straightforward to specify and stock across a facility's panelboards and fuse holders.

Key Features

  • Amp Rating Range: Available across the full KWN-R Series lineup from 1A to 60A (1A, 3A, 6A, 10A, 15A, 20A, 25A, 30A, 40A, 50A, 60A) to match a wide range of circuit load requirements.
  • Fast-Acting Response: LIMITRON fast-acting design provides quick fault clearing for reliable overcurrent protection in general-purpose circuits.
  • Class RK1 Fuse: Meets Class RK1 fuse specifications, delivering current-limiting performance and high interrupting capacity for demanding electrical systems.
  • Non-Indicating Type: Standard non-indicating construction suited to general-purpose fuse holder and panelboard applications where blown-fuse indication is not required.
  • Standard Configuration: Standard type fuse construction suited for common branch-circuit and equipment protection uses across commercial and industrial facilities.
  • Eaton Bussmann Series: Part of the established Bussmann KWN-R series, engineered by Eaton Bussmann for dependable, code-oriented electrical system protection.
  • Broad Rating Selection: Eleven amp rating options in one series simplify stocking and specification across multiple circuit sizes within a single facility or project.

Technical Specifications

  • Series: KWN-R
  • Fuse Type: LIMITRON Fast-Acting
  • Fuse Class: RK1
  • Indication: Non-Indicating
  • Configuration: Standard
  • Amp Rating Options: 1A, 3A, 6A, 10A, 15A, 20A, 25A, 30A, 40A, 50A, 60A

Typical Applications

  • Branch-Circuit Overcurrent Protection
  • Commercial and Industrial Electrical Panels
  • Motor and Equipment Circuit Protection
  • Panelboard and Fuse Holder Installations
  • General-Purpose Fast-Acting Fuse Replacement
  • Facilities Standardizing on a Single Class RK1 Fuse Series Across Multiple Amp Ratings

Why Bussmann?

Bussmann KWN-R Series fuses are built to Class RK1 standards, delivering fast-acting, current-limiting overcurrent protection across a wide range of amp ratings from 1A to 60A. The non-indicating, standard construction makes this series a dependable, straightforward choice for electricians and facility teams standardizing on Eaton Bussmann LIMITRON fuse protection for branch-circuit and equipment applications where consistent, code-oriented current-limiting performance matters.

Manufacturer Resources

Product Specs

Packaging Type:
Standard
Department:
Electrical
Fuse Indicator:
Non-indicating
Class:
Class RK1
Compliances:
Not Applicable
Product Type:
Fuse
Series:
KWN-R
Amperage Rating:
1A - 60A
Standards:
Class RK1
Configuration:
Non-Indicating
Product Group:
Fuses
Product Subgroup:
Other Fuses

Bussmann KWN-R-10 – Frequently Asked Questions

1) What amp ratings does the Bussmann KWN-R LIMITRON fuse come in?
The KWN-R Series runs 1A through 60A, in eleven steps: 1, 3, 6, 10, 15, 20, 25, 30, 40, 50 and 60 amps. Part numbers follow the rating directly, so a 30 amp fuse is KWN-R-30 and a 60 amp is KWN-R-60. That spread lets a facility stock one series across most branch-circuit and equipment sizes instead of mixing families.
2) Can a Class RK1 fuse like the KWN-R go into a fuse block that currently holds Class RK5 or Class H fuses?
Yes. Class R fuses share rejection-style Class R dimensions, so an RK1 such as the KWN-R drops into any Class R block of the same amp and voltage rating, including one holding RK5. It will also fit a non-rejecting Class H clip of the same case size, and swapping up to RK1 gives you a faster-acting, current-limiting element. What you cannot do is put an RK5 or Class H fuse into a Class R rejection block.
3) Is the KWN-R a fast-acting or time-delay fuse, and will it hold a motor starting inrush?
Fast-acting. The KWN-R is a LIMITRON fast-acting Class RK1, built to clear faults quickly rather than ride through inrush. For a motor circuit where you are sizing at or near full-load amps, a fast-acting fuse will nuisance-open on starting current. Use a fast-acting RK1 where the load is non-inductive or where it backs up a separate overload device, and choose a dual-element time-delay Class RK1 when the fuse itself has to tolerate motor start.
4) What does non-indicating mean on the KWN-R fuse, and does it matter for troubleshooting?
Non-indicating means there is no pop-up pin or window to show the fuse has opened. You find the blown one by testing continuity or voltage across the holder. For panelboards and enclosed disconnects where you meter anyway, that is fine. If your maintenance team wants to spot an open fuse visually behind a door or on a remote skid, specify an indicating version instead.
5) Why choose Class RK1 over Class RK5 for equipment protection?
RK1 lets through less energy on a fault than RK5 at the same amp rating, so it protects downstream conductors and equipment more tightly. That is the reason a drawing calling for current-limiting protection usually specifies RK1. The KWN-R is a Class RK1 built to that standard, in ratings from 1A to 60A. If the spec only calls for general-purpose protection and no let-through limit, RK5 is the looser and cheaper route.
6) How do I order the right KWN-R fuse, and how many do I need?
The only thing to specify is the amp rating; the series is otherwise fixed as fast-acting, non-indicating, standard configuration. Order by the rating suffix, for example KWN-R-15 for 15 amps or KWN-R-1 for 1 amp. Buy one per ungrounded conductor: three for a three-phase disconnect, two for a two-pole circuit. Most shops carry a spare set of each rating they run.
7) I need a replacement for a blown KWN-R in an industrial panel. Is a like-for-like swap enough?
Match the amp rating and you are replacing like for like, since the KWN-R Series is a single construction across all eleven ratings. Replace all fuses in the set, not just the open one, so the remaining poles do not carry aged elements. And find the fault first: a fast-acting current-limiting fuse opens on a short or a genuine overload, so a repeat opening is a circuit problem, not a fuse problem.
How fast can I get the Bussmann KWN-R-10 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 KWN-R-10 come with a warranty?
Absolutely. The Bussmann KWN-R-10 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 KWN-R-10?
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
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