Bussmann FNQ Series Midget Tim...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$81.27
Bussmann FNQ Series Midget Time-Delay Fuse, 500V

Bussmann FNQ Series Midget Time-Delay Fuse, 500V

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Model: FNQ-2-1/2

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

$81.27
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Bussmann FNQ Series Midget Time-Delay Fuse, 500V

The Bussmann FNQ Series is a family of 500V Midget-style time-delay (TD) fuses engineered to provide dependable, code-compliant overcurrent protection in a compact footprint. This series is available across a broad range of amperage ratings, from 1/10A through 6-1/4A, giving electricians, panel builders, OEMs, and maintenance professionals a single trusted fuse family for precise, low-current protection needs. Every fuse in the FNQ Series shares the same 500V voltage rating and Midget form factor, with a time-delay element engineered to ride through momentary current surges, inrush events, and temporary overload conditions without opening unnecessarily. Because Midget-style fuses are smaller than standard fuse classes, the FNQ Series is widely selected where panel space is at a premium, fitting standard Midget-style fuse holders and fuse blocks commonly used in industrial and commercial control panels. Select the amperage rating that matches your circuit's specific overcurrent protection requirement from the available options in this family.

Key Features

  • Amperage Rating Range: Available from 1/10A through 6-1/4A, allowing precise selection of overcurrent protection tailored to low-current control and instrumentation circuits.
  • Voltage Rating: Every fuse in the FNQ Series is rated 500V, giving the headroom needed for a wide range of circuit voltage applications in commercial and industrial electrical systems.
  • Midget Fuse Design: Compact Midget-style fuse body is sized to fit standard Midget fuse holders, fuse blocks, and disconnect switches, making it easy to specify as a drop-in replacement across existing installations.
  • Time-Delay (TD) Construction: Time-delay fuse element is engineered to ride through temporary current surges and inrush conditions, such as motor starting current, without opening, reducing nuisance fuse replacement.
  • FNQ Series: Part of the established Bussmann FNQ family of Midget time-delay fuses, built for consistent, repeatable performance across amperage ratings and production lots.
  • Space-Saving Format: The Midget fuse class occupies less physical space than larger fuse types, supporting higher packing density in fuse panels and disconnect blocks.
  • Compact Footprint: The Midget fuse form factor saves panel and enclosure space compared to larger fuse classes, supporting compact panel design across the entire series.

Technical Specifications

  • Series: FNQ
  • Voltage Rating: 500V
  • Amperage Range: 1/10A - 6-1/4A (select amperage rating at time of order)
  • Fuse Class: Midget
  • Time-Delay Type: Time-Delay (TD)

Typical Applications

  • Control Circuit Overcurrent Protection
  • Motor and Transformer Circuit Protection
  • Panelboard and Control Panel Fusing
  • Instrumentation and Low-Current Circuit Protection
  • Industrial and Commercial Electrical Equipment Protection
  • Fuse Panel and Disconnect Block Retrofits

Why Bussmann?

Bussmann fuses are engineered for consistent, dependable overcurrent protection that electrical professionals rely on for code-compliant installations across industrial and commercial facilities. The FNQ Series combines a compact Midget form factor with time-delay performance across its full amperage range, giving installers and OEMs a space-saving fuse solution built for demanding, low-current electrical systems. With decades of fuse manufacturing experience behind the Bussmann name, the FNQ Series is manufactured to consistent quality standards that support safe, reliable circuit protection at every amperage rating offered. When you need overcurrent protection you can trust for critical control and instrumentation circuits, Bussmann's FNQ Series delivers the rated performance electrical professionals expect.

Manufacturer Resources

Product Specs

Product Type:
Time-Delay Fuse
Voltage Rating:
500V
Amperage Rating:
1/10A - 6-1/4A
Series:
FNQ
Configuration:
Time-Delay
Department:
Electrical
Product Subgroup:
Fuses
list_batch:
BUSS-20260919
Product Group:
Circuit Protection

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

1) Will a Bussmann FNQ fuse fit my existing midget fuse holder?
Yes. The FNQ Series uses the Midget fuse class body, which is sized for standard Midget fuse holders, fuse blocks, and disconnect switches used in industrial and commercial control panels. If what you are pulling out is a Midget fuse, an FNQ of the same amperage drops into the same clips.
2) What amperages does the Bussmann FNQ time-delay fuse come in?
The FNQ family runs from 1/10A up to 6-1/4A, so it covers low-current control and instrumentation work rather than feeder protection. Orderable ratings include FNQ-1/10, FNQ-1/8, FNQ-2/10, FNQ-8/10, FNQ-1-1/4, FNQ-2-1/4, FNQ-2-1/2, FNQ-3-1/2, FNQ-4-1/2 and FNQ-6-1/4. If your circuit needs more than 6-1/4A, this family will not cover it.
3) Can I use a 500V fuse on a 240V or 480V control circuit?
Yes. The 500V rating on the FNQ Series is a maximum, so it can be applied on any circuit at or below that voltage, which covers 120V, 240V and 480V control and transformer circuits. A fuse voltage rating must equal or exceed the circuit voltage, never the other way around. Do not use it on a 600V system.
4) Why does my control fuse keep blowing on transformer inrush, and will a time-delay fuse fix it?
That is exactly what the FNQ Series is built for. It is a time-delay (TD) element, so it rides through momentary inrush and short overloads, like control transformer magnetizing current or motor starting current, instead of opening. A fast-acting midget of the same amperage will nuisance-blow on the same circuit. Keep the amperage sized to the circuit requirement and let the time delay absorb the surge.
5) What is the difference between an FNQ and an FNQ-R part number when ordering?
Both are offered in the Bussmann FNQ time-delay midget family, and the suffix is part of the catalogue designation you order by, not an option you add later. Order the exact number printed on the fuse you are replacing. FNQ-R ratings available include FNQ-R-1/4, FNQ-R-3/10, FNQ-R-6/10, FNQ-R-1-1/8, FNQ-R-1-1/4, FNQ-R-1-3/10, FNQ-R-2-1/4, FNQ-R-2-1/2 and FNQ-R-3-1/2. Plain FNQ ratings are a separate list. Do not cross between the two prefixes on a substitution.
6) I need very low amperage protection for an instrumentation circuit - does this series go low enough?
It does. The smallest rating in the FNQ family is 1/10A (FNQ-1/10), with 1/8A, 2/10A, 3/10A and 6/10A steps also available, which is the range used for instrumentation, PLC and metering circuits where a 1A fuse would be too coarse to protect anything.
7) Can I standardize one fuse family across all the control panels in my facility?
For low-current control fusing, yes. Every rating in the FNQ Series shares the same 500V rating, the same Midget form factor and the same time-delay element, so one holder type and one stocking family covers circuits from 1/10A through 6-1/4A. That keeps your MRO crib to a single fuse block style and a row of amperages rather than mixed classes.
How fast can I get the Bussmann FNQ-2-1/2 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-2-1/2 come with a warranty?
Absolutely. The Bussmann FNQ-2-1/2 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-2-1/2?
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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