Bussmann FNQ-R Series Class CC...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$25.64
Bussmann FNQ-R Series Class CC Time-Delay Fuse, 600V

Bussmann FNQ-R Series Class CC Time-Delay Fuse, 600V

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Model: FNQ-R-1/2

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

$25.64
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Bussmann FNQ-R Series Class CC Time-Delay Fuse, 600V

The Bussmann FNQ-R Series is an Eaton Bussmann line of Class CC time-delay fuses rated 600V, available in amperage ratings from 1/2 A (0.5 A) up to 25 A to match a wide range of branch-circuit and equipment overcurrent protection needs. Every fuse in the series carries a 200kAIC interrupt rating for dependable fault-current withstand capability, ferrule end x ferrule end terminations, and a rugged melamine tube body built to standard Class CC dimensions for footprint-compatible installation into existing Class CC fuse holders, blocks, and disconnect switches. Across the amperage range, the series opens in 12 seconds at 200% of rated current, allowing momentary inrush conditions such as motor starting to pass through without nuisance blowing while still protecting conductors and connected equipment. Select the amperage rating that matches your circuit requirements and get the same proven Class CC construction and performance in every option.

Key Features

  • Amperage Range: Available from 1/2 A (0.5 A) through 25 A, letting you select the exact Class CC fuse rating for the circuit being protected.
  • Voltage Rating: 600V rating supports branch-circuit and equipment overcurrent protection across commercial and industrial systems.
  • Durable Construction: Melamine tube body provides mechanical strength and thermal stability in demanding electrical environments.
  • Time-Delay Performance: Opens in 12 seconds at 200% of rated current across the series, allowing momentary overloads such as motor inrush to pass without nuisance operation.
  • Ferrule End x Ferrule End: Ferrule terminations for compatibility with standard Class CC fuse holders, blocks, and disconnects.
  • High Interrupt Rating: 200kAIC interrupt rating delivers high fault-current withstand capability for demanding circuits.
  • Class CC Fuse: Standard Class CC dimensions allow footprint-compatible installation into existing Class CC fuse blocks and holders.
  • Non-Indicating, Standard Design: Standard non-indicating construction for reliable, code-compliant overcurrent protection across the amperage range.

Technical Specifications

  • Class: CC
  • Interrupt Rating: 200 kiloamps
  • Product Details: Current-limiting High Inrush Time-delay Fuse
  • Enclosure Material: Stainless Steel
  • Amperage Rating: 4A (representative option; also available at 1/2 A and 25 A)

Typical Applications

  • Class CC Branch-Circuit Fuse Protection
  • Motor and Equipment Overcurrent Protection
  • Industrial and Commercial Electrical Panels
  • Control Circuit and OEM Equipment Protection
  • Panelboard and Disconnect Switch Fusing

Why Bussmann?

Bussmann by Eaton is a recognized name in circuit protection, and the FNQ-R series Class CC fuse line reflects that engineering standard with its melamine tube construction, 200kAIC interrupt rating, and consistent 12-second time-delay response at 200% of rated current across every amperage option from 1/2 A to 25 A. The ferrule end x ferrule end configuration and standard Class CC footprint make the FNQ-R Series a straightforward, code-compliant replacement in existing fuse holders and blocks. Choose the Bussmann FNQ-R Series for dependable overcurrent protection in professional electrical installations, whatever amperage rating your circuit demands.

Manufacturer Resources

Product Specs

Product Type:
Time-Delay Fuse
Series:
FNQ-R
Voltage Rating:
600V
Connection Type:
Ferrule End x Ferrule End
Department:
Electrical
Product Subgroup:
Fuses
list_batch:
BUSS-20260919
Product Material:
Stainless Steel
Product Width:
.41 inches
Product Weight:
.15 pounds
Class:
CC
Interrupt Rating:
200 kiloamps
Product Details:
Current-limiting High Inrush Time-delay Fuse
Product Height:
1.5 inches
End Type:
Ferrule
Enclosure Material:
Stainless Steel
Configuration:
Ferrule End x Ferrule End
Product Group:
Circuit Protection
Product Length:
0.41 in

Bussmann FNQ-R-1/2 – Frequently Asked Questions

1) Will a Bussmann FNQ-R fuse drop into my existing Class CC fuse holder?
Yes. The FNQ-R is a true Class CC fuse with ferrule end x ferrule end terminations and standard Class CC dimensions, so it seats in Class CC holders, blocks and fused disconnects without changing the mounting. The body measures 1.5 inches by .41 inches, which is the standard 13/32 x 1-1/2 inch Class CC envelope. One caution: Class CC holders are rejection-style, so a Class CC fuse goes in but a midget fuse without the rejection feature is not interchangeable in the other direction.
2) Will the FNQ-R hold on motor inrush without nuisance blowing?
That is what the time delay is for. The FNQ-R opens in 12 seconds at 200 percent of its rated current, so a starting motor or a transformer magnetizing surge rides through instead of clearing the fuse. It is a current-limiting high inrush time-delay fuse, so it still cuts let-through energy on a real fault.
3) Which amp ratings does the Bussmann FNQ-R time-delay fuse come in?
The FNQ-R series spans 1/2 A through 25 A. Three ratings are offered: FNQ-R-1/2 at 1/2 A (0.5 A), FNQ-R-4 at 4 A, and FNQ-R-25 at 25 A. Every rating is 600V with the same 200 kA interrupting capability, so you are only choosing the amperage for the circuit you are protecting.
4) Can I use a 600V FNQ-R fuse on a 480V or 240V circuit?
Yes. The FNQ-R is rated 600V, and a fuse voltage rating is a maximum, so it is fine on 480V, 240V or 120V systems. What it cannot do is go above 600V. Match the amperage to the circuit and the 600V rating covers anything at or below that.
5) Is 200kAIC enough for my panel's available fault current?
The FNQ-R carries a 200 kiloamp interrupting rating, which is the top tier for Class CC and covers essentially any available fault current you will see on a commercial or industrial branch circuit or control circuit. It is also current-limiting, which is what lets it be used in series-rated and SCCR-documented assemblies.
6) I'm standardizing fuses across several panels. Does anything change between the 1/2 A and the 25 A FNQ-R?
Only the amperage. All three ratings, 1/2 A, 4 A and 25 A, share the 600V rating, the 200 kA interrupting rating, the Class CC ferrule x ferrule body, and the same 12-second-at-200-percent time delay. Same holders, same blocks, same footprint, so you can stock one holder type across the facility and carry just the amp ratings you need.
7) Should I use a time-delay Class CC fuse like the FNQ-R or a fast-acting one?
Pick the FNQ-R where the load has an inrush you do not want to clear on: motor starters, transformers, solenoids, OEM equipment control circuits. Its 12-second hold at 200 percent of rating is the whole point. For a purely resistive or electronic load with no startup surge, a fast-acting Class CC fuse is the better choice because it clears quicker on an overload. Both share the same Class CC ferrule footprint, so the holder does not change.
8) Does the FNQ-R have a blown-fuse indicator?
No. The FNQ-R is a standard non-indicating design, so there is no pop-up pin or window to show it has opened. On a panel where a tech needs to spot the open fuse at a glance you will want an indicating style instead, or rely on a fuse holder with an indicating feature.
9) What is the FNQ-R fuse body made of, and will it hold up in a hot control cabinet?
The tube is melamine, which gives mechanical strength and thermal stability, and the end ferrules and enclosure material are stainless steel. That combination is what holds up in a warm, vibrating industrial enclosure better than a glass-body midget fuse.
How fast can I get the Bussmann FNQ-R-1/2 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 FNQ-R-1/2 come with a warranty?
Absolutely. The Bussmann FNQ-R-1/2 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 FNQ-R-1/2?
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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