Bussmann KTK-R-1 Limitron Clas...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$24.95
Bussmann KTK-R-1 Limitron Class CC Rejection Fuse, 1-Amp 600V AC, Fast-Acting

Bussmann KTK-R-1 Limitron Class CC Rejection Fuse, 1-Amp 600V AC, Fast-Acting

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Model: KTK-R-1

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

$24.95
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Bussmann KTK-R-1 Limitron Class CC Rejection Fuse, 1-Amp 600V AC, Fast-Acting

The Bussmann KTK-R-1 is a Limitron-series Class CC rejection fuse engineered for reliable overcurrent protection in low-amperage electrical circuits. Rated 1-Amp at 600-Volt AC, this single-element, fast-acting fuse delivers current-limiting performance that helps protect conductors, control devices, and connected equipment from short-circuit and overload conditions. Its Class CC rejection-style body is sized to fit only Class CC fuse holders and fuse blocks, which helps prevent accidental substitution with fuses that lack an adequate interrupting rating for the application. As part of the Bussmann Limitron family, the KTK-R-1 is well suited for control circuits, lighting panels, and other low-amperage applications that require dependable, code-compliant branch circuit protection.

Key Features

  • Current Rating: Rated 1-Amp for precise, low-amperage overcurrent protection in control and branch circuits.
  • Voltage Rating: Rated 600-Volt AC, supporting use in higher-voltage control panels and branch circuit applications.
  • Class CC Rejection Style: Rejection-style fuse body is sized to fit only in Class CC fuse holders, helping prevent the use of non-rejection fuses in the circuit.
  • Fast-Acting Response: Single-element, fast-acting construction responds quickly to overcurrent conditions for dependable circuit protection.
  • Current-Limiting Design: Current-limiting performance helps reduce fault current let-through energy, protecting downstream conductors and equipment.
  • Single-Element Construction: Single-element design provides straightforward, reliable operation for general overcurrent protection duties.
  • Limitron Series: Part of the Bussmann Limitron family of fast-acting, current-limiting fuses used throughout commercial and industrial electrical systems.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Branch Circuit Overcurrent Protection
  • Motor Control and Industrial Control Panels
  • Lighting and Low-Amperage Circuit Protection
  • Class CC Fuse Holders and Fuse Blocks
  • Commercial and Industrial Electrical Systems
  • Control Circuit and Equipment Protection

Why Bussmann?

Bussmann is a trusted name in circuit protection, and the Limitron series is engineered for dependable, fast-acting performance in demanding electrical applications. The KTK-R-1's single-element, current-limiting construction and Class CC rejection design help ensure proper fuse selection and consistent, code-compliant protection for connected equipment. Choose Bussmann for overcurrent protection built to perform reliably in professional electrical installations.

Manufacturer Resources

Product Specs

list_batch:
BUSS-20260919
Product Type:
Fast-Acting Fuse
Series:
Limitron
Voltage Rating:
600V
Amperage Rating:
1A
Configuration:
Class CC Rejection
Department:
Electrical
Product Subgroup:
Fuses
Product Group:
Circuit Protection

Bussmann KTK-R-1 – Frequently Asked Questions

1) Will a Bussmann KTK-R-1 fit a standard 13/32 x 1-1/2 inch non-rejection fuse holder?
No. The KTK-R-1 is built as a Class CC rejection fuse, so the body is sized to drop into Class CC holders and blocks only. A plain midget holder without the Class CC rejection feature will not accept it. If your panel uses non-rejection midget clips, you either change out the holder for a Class CC block or use a non-rejection midget fuse instead.
2) Can I use a 1-amp 600V Class CC fuse on a 480V or 240V control transformer circuit?
Yes. The KTK-R-1 carries a 600V AC rating, and a fuse may be applied at or below its voltage rating, so it covers 480V and 240V control circuits as well as 600V. Going the other direction is not allowed: never apply it above 600V AC.
3) Is a fast-acting Class CC fuse the right choice for a motor starter, or do I need a time-delay fuse?
The KTK-R-1 is single-element and fast-acting, which suits control circuits, lighting panels and other low-amperage loads with no inrush to ride through. For a motor circuit or a control transformer with real magnetizing inrush, a fast-acting 1-amp element will likely open on energization; that application wants a time-delay Class CC fuse (Bussmann's FNQ-R or LP-CC families) in the same holder. The fuse body is identical Class CC, so the holder does not change.
4) What does current-limiting mean on the KTK-R-1, and why does it matter for my panel's short-circuit rating?
Current-limiting means the fuse clears a high fault so fast that it cuts off the current before it reaches its full prospective peak, which lowers the let-through energy seen by the wiring and the devices downstream. That is what lets a Class CC fuse be used to protect control devices and conductors in a panel and is the reason rejection-style holders are specified: the rejection feature keeps someone from dropping in a fuse without an adequate interrupting rating later on.
5) I need to order replacement 1-amp control fuses. What part number do I give my distributor?
The manufacturer part number is KTK-R-1 (Bussmann Limitron series), rated 1 amp at 600V AC. The KTK-R designation is the family; the trailing number is the amp rating, so a 2-amp of the same type is KTK-R-2. Specify the full number including the amp value so you do not get a different rating in the same rejection body.
6) Can I swap a 1-amp KTK-R-1 into a holder that currently has a 10-amp fuse to reduce nuisance tripping?
Mechanically yes, since all KTK-R ratings share the same Class CC rejection body, but the amp rating has to match the circuit's overcurrent protection requirement and the conductor it protects, not convenience. Dropping to 1 amp on a circuit engineered for a larger fuse will open under normal load. Match the rating to the panel schedule or equipment nameplate.
7) Where in a commercial building would a 1-amp Class CC fuse typically be used?
Low-amperage protection points: industrial and motor control panels, control circuit and equipment protection, lighting and other small branch circuits, and anywhere a Class CC block or holder is already installed. For facility MRO stock, it is a common spare behind control transformers and relay circuits in 600V-class panels.
How fast can I get the Bussmann KTK-R-1 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 KTK-R-1 come with a warranty?
Absolutely. The Bussmann KTK-R-1 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 KTK-R-1?
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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