Bussmann KTN-R LIMITRON Class ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$111.59
Bussmann KTN-R LIMITRON Class RK1 Fast-Acting Fuse, 250V

Bussmann KTN-R LIMITRON Class RK1 Fast-Acting Fuse, 250V

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Model: KTN-R-4

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

$111.59
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Bussmann KTN-R-8 LIMITRON Class RK1 Fast-Acting Fuse, 8A, 250V

The Bussmann KTN-R-8 is an Eaton Bussmann series KTN-R LIMITRON fast-acting fuse engineered for panelboard overcurrent protection. Rated 8 A at 250 V, this Class RK1 fuse features a single-element, non-indicating, standard design suited for reliable circuit protection in commercial and industrial panelboards. Its fast-acting response makes it an effective choice wherever dependable branch-circuit fuse protection is required, helping electricians and facility managers maintain code-compliant overcurrent protection on panelboard circuits.

Key Features

  • Amperage Rating: 8 A rating delivers precise overcurrent protection sized for panelboard branch circuits.
  • Voltage Rating: 250 V standard voltage rating suited for common panelboard circuit configurations.
  • Class RK1 Construction: Class RK1 fuse construction provides dependable, code-recognized short-circuit and overload protection.
  • Fast-Acting Response: LIMITRON fast-acting design clears overcurrent conditions quickly to help protect connected equipment and conductors.
  • Single Element Design: Non-indicating, single-element (1) construction for straightforward, standard fuse operation.
  • Standard Type: Non-indicating, standard configuration simplifies panelboard fuse installation and replacement.
  • Eaton Bussmann Series KTN-R: Part of the Eaton Bussmann series KTN-R LIMITRON fuse lineup used across panelboard applications.

Technical Specifications

  • Amperage Rating: 8 A
  • Compliances: Not Applicable
  • Number Of Elements: 1
  • Product Height: .56 in
  • Product Length Depth: 2 in
  • Product Weight: .1 lb
  • Product Width: .56 in

Typical Applications

  • Panelboard Overcurrent Protection
  • Branch Circuit Fuse Protection
  • Commercial and Industrial Electrical Distribution
  • General Purpose Circuit Protection
  • Equipment and Feeder Circuit Protection
  • Replacement Fuse for Standard Panelboard Fuse Holders

Why Bussmann?

Bussmann by Eaton is a trusted name in circuit protection, and the KTN-R series LIMITRON fast-acting fuse reflects that reliability with its Class RK1 construction and standard, non-indicating design. Choosing the Bussmann KTN-R-8 helps ensure dependable, code-recognized overcurrent protection for panelboard circuits in professional electrical installations, giving electrical contractors and maintenance teams confidence in consistent performance.

Manufacturer Resources

Product Specs

Product Width:
.56 in
Product Weight:
.1 lb
Department:
Electrical
Packaging Type:
Standard
Fuse Indicator:
Non-indicating
Product Group:
Circuit Protection
Class:
Class RK1
Number Of Elements:
1
Voltage Rating:
250V
Compliances:
Not Applicable
Product Type:
Fast-Acting Fuse
Product Subgroup:
Fuses

Bussmann KTN-R-4 – Frequently Asked Questions

1) What amp ratings does the Bussmann KTN-R LIMITRON fuse come in?
The KTN-R LIMITRON Class RK1 fuse is offered in four amp ratings: 2A (KTN-R-2), 4A (KTN-R-4), 8A (KTN-R-8), and 12A (KTN-R-12). All are 250V rated, single-element, non-indicating fast-acting fuses. Pick the rating that matches the branch circuit or equipment you are protecting.
2) Can I use a 250V KTN-R fuse on a 480V circuit?
No. The KTN-R is rated 250V and must not be applied above that. A 250V fuse in a 480V circuit may not safely interrupt a fault. For 480V/600V class RK1 protection you need the 600V equivalent of the LIMITRON line, the KTS-R.
3) Will a Class RK1 fuse fit my existing Class R fuse block?
Yes, if the block is Class R rated. The KTN-R carries the rejection-style Class R notch, so it drops into standard Class R fuse blocks and switches. It will also physically fit older non-rejection Class H/K clips of the same amp and 250V voltage range, but a Class R block will not accept a non-rejection fuse, which is the point of the rejection feature.
4) Is a fast-acting fuse the right choice for a motor circuit?
Usually not for motor branch circuits. The KTN-R is a single-element, fast-acting design, so it clears overcurrent quickly and will often open on normal motor inrush. Fast-acting RK1 is suited to panelboard branch circuits, feeders, and non-inductive loads. For motors and transformers with high inrush you want a dual-element time-delay Class RK1 or RK5, such as the Bussmann FRN-R or FRS-R.
5) Can I replace a Class RK5 fuse with the KTN-R?
Mechanically yes, both RK1 and RK5 share the Class R case and rejection notch, so the KTN-R will fit the same block at the same amp and 250V rating. Electrically it is a different fuse: RK1 is the lower let-through class, and the KTN-R is fast-acting rather than time-delay. Swapping a time-delay RK5 for this fast-acting RK1 on a motor or transformer circuit will cause nuisance openings, and any equipment marked for a specific fuse class should be fused as marked.
6) Does the KTN-R fuse have a blown-fuse indicator?
No. The KTN-R is a non-indicating fuse in the standard configuration, so there is no visual pop-out or LED flag. You check it with a meter or continuity tester. If maintenance staff need at-a-glance identification of an open fuse, specify an indicating version instead.
7) I need to standardize panelboard fuses across a facility. Is the KTN-R a good single spec?
For 250V panelboard and feeder circuits, yes, within its amp range. The KTN-R keeps one class (RK1), one voltage (250V), and one non-indicating single-element design across the 2A, 4A, 8A, and 12A ratings, so the fuse blocks and stocking practice stay identical and only the amp rating changes. Motor and transformer circuits should still be carried separately on a time-delay fuse.
How fast can I get the Bussmann KTN-R-4 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 KTN-R-4 come with a warranty?
Absolutely. The Bussmann KTN-R-4 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 KTN-R-4?
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 KTN-R-4 from ZenSupply?
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