Bussmann FNM Midget Time-Delay...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$39.70
Bussmann FNM Midget Time-Delay Fuse, 250V Dual-Element

Bussmann FNM Midget Time-Delay Fuse, 250V Dual-Element

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Model: FNM-1/2

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

$39.70
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Bussmann FNM Midget Time-Delay Fuse, 250V Dual-Element

The Bussmann FNM Midget fuse is a compact, 250V-rated time-delay (dual-element) fuse built to protect circuits from sustained overcurrent conditions while riding through harmless, momentary inrush. As a family, the FNM Midget series is offered in amp ratings from 2A through 25A (2A, 3A, 4A, 6A, 7A, 9A, 12A, 25A), letting you match fuse selection precisely to the branch circuit or equipment load being protected. The dual-element construction combines short-circuit and overload protection in a single Midget-body fuse, making it a dependable choice wherever compact time-delay protection is required.

Key Features

  • Amp Rating Range: Available across 2A, 3A, 4A, 6A, 7A, 9A, 12A, and 25A ratings, so the correct Midget fuse can be matched to the specific circuit load.
  • 250V Rating: Rated 250V for use in standard low-voltage branch circuits and equipment protection applications.
  • Dual-Element Design: Number of elements is Dual, combining fast-acting short-circuit response with time-delay overload protection in one fuse.
  • Time-Delay Fuse Type: Classified as a Time Delay Fuse, allowing it to hold through brief inrush or starting current spikes without nuisance opening.
  • Compact Midget Form Factor: The FNM Midget body size delivers reliable overcurrent protection in a smaller footprint than standard fuse classes.
  • Standard Packaging: Supplied in standard packaging for straightforward stocking and distribution.

Technical Specifications

  • Number Of Elements: Dual
  • Packaging Type: Standard
  • Product Type: Time Delay Fuses
  • Voltage Rating: 250V
  • Amp Rating Options: 2A, 3A, 4A, 6A, 7A, 9A, 12A, 25A

Typical Applications

  • Branch Circuit Overcurrent Protection
  • Motor and Control Circuit Protection
  • HVAC and General Electrical Equipment
  • Panelboard and Load Center Fuse Replacement
  • Commercial and Industrial Electrical Systems

Why Bussmann?

Bussmann FNM Midget fuses pair a dual-element, time-delay design with a wide 2A-25A rating range and a 250V rating, giving electrical professionals a dependable, code-compliant option for overcurrent protection across a broad set of circuit sizes. The Midget form factor and standard packaging make these fuses easy to stock and specify consistently across projects. Choose Bussmann FNM fuses for reliable, application-matched circuit protection.

Manufacturer Resources

Product Specs

Number Of Elements:
Dual
Packaging Type:
Standard
Department:
Electrical
Product Type:
Time Delay Fuses
Voltage Rating:
250V
Series:
FNM
Amperage Rating:
2A - 25A
Product Group:
Fuses
Product Subgroup:
Time Delay Fuses

Bussmann FNM-1/2 – Frequently Asked Questions

1) What voltage is the Bussmann FNM midget fuse rated for, and can I use it on a 480V circuit?
The FNM series is a 250V fuse, so it belongs on low voltage branch and control circuits at 250 volts or less. Don't put it on a 480V system. Fuse voltage rating has to be equal to or greater than the circuit voltage, so a 480V application needs a fuse rated for at least that.
2) What does dual-element mean on a Bussmann FNM fuse, and will it hold through motor starting current?
Dual-element is why it rides through inrush. One element handles short circuits fast, the other gives the time delay on sustained overloads, so a motor or transformer inrush spike doesn't blow the fuse the way a fast-acting midget would. That makes FNM the right pick for motor and control circuit protection and for HVAC equipment where a single-element fuse nuisance trips on startup.
3) Which amp ratings can I order in the Bussmann FNM midget fuse?
FNM is ordered by amp rating, and the catalog numbers run from fractional through 35A: FNM-1/10, FNM-1, FNM-2, FNM-3, FNM-4, FNM-5, FNM-6, FNM-7, FNM-9, FNM-10, FNM-25 and FNM-35. The number after the dash is the ampere rating, so you order by the rating your circuit or equipment nameplate calls for.
4) Is the FNM a midget-size fuse, and will it drop into my existing fuse holder?
FNM is a midget body fuse, a smaller footprint than the standard fuse classes. It fits holders and blocks built for midget fuses. It is not a substitute for a Class R, Class J or Class CC fuse holder, so check that the block in your panel is actually a midget holder before swapping.
5) Should I use a time-delay FNM fuse or a fast-acting midget fuse?
Go time-delay when the load has an inrush: motors, transformers, solenoids, HVAC compressors. The dual-element FNM holds through that brief starting surge and still opens on a real sustained overload or short. Fast-acting midgets are for loads with no inrush, like resistive circuits and some electronics where you want the fastest possible clearing.
6) Can I use a Bussmann FNM fuse for branch circuit protection in a commercial panel?
Yes. The FNM midget is used for branch circuit overcurrent protection, panelboard and load center fuse replacement, and general commercial and industrial equipment protection, as long as the circuit is within the fuse's 250V rating and the holder is midget size. For MRO stocking, carrying several amp ratings of the same series keeps replacement consistent across a facility.
7) How is the Bussmann FNM fuse packaged for distribution?
FNM ships in standard packaging, which is what you want for shelf stocking and pulling single ratings off the truck. Each amp rating is its own catalog number, so a distributor or MRO crib stocks by rating rather than by kit.
How fast can I get the Bussmann FNM-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 FNM-1/2 come with a warranty?
Absolutely. The Bussmann FNM-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 FNM-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
Why buy the Bussmann FNM-1/2 from ZenSupply?
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