Bussmann FNA-1 Series Midget T...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$75.80
Bussmann FNA-1 Series Midget Time-Delay Fuse, 125V

Bussmann FNA-1 Series Midget Time-Delay Fuse, 125V

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Model: FNA-1-6/10

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

$75.80
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Bussmann FNA-1 Series Midget Time-Delay Fuse, 125V

The Bussmann FNA-1 Series Midget Time-Delay Fuse is a compact 125V overcurrent protection device engineered for control circuits, control transformers, and equipment that requires dependable time-delay fuse protection. This FNA-1 midget-style TD (time-delay) fuse is built to withstand momentary inrush current and brief overload conditions without nuisance opening, while still interrupting the circuit reliably under sustained fault or overcurrent conditions. This listing is available across the FNA-1 series amperage lineup, with amp ratings spanning from 0.8A through 1.6A, so the correct rating can be matched to the specific circuit or equipment being protected. Sized to fit standard midget fuse holders and fuse blocks, it offers a space-saving overcurrent protection solution for panels and equipment with limited mounting space. It is manufactured by Bussmann, a recognized supplier of fuses and circuit protection products for commercial, industrial, and OEM electrical systems.

Key Features

  • Voltage Rating: 125V rating suited for control circuits, control transformers, and other low-voltage equipment protection applications where a 125V-rated fuse is required.
  • Amp Rating Range: Available in FNA-1 series amp ratings from 0.8A to 1.6A, allowing the fuse to be matched precisely to the load and protection requirements of the circuit.
  • Midget Fuse Form Factor: Compact midget-style body sized to fit standard midget fuse holders, fuse blocks, and disconnect switches, making it ideal for space-constrained panels and equipment.
  • Time-Delay (TD) Operation: Time-delay design allows the fuse to ride through brief inrush current and temporary overload conditions without nuisance opening, while still opening reliably to protect the circuit under sustained overcurrent conditions.
  • FNA-1 Series Designation: Part of the Bussmann Fusetron FNA-1 series, a lineup of midget time-delay fuses covering multiple amp ratings within a common form factor and voltage rating.
  • Bussmann Manufactured: Produced by Bussmann, a recognized manufacturer of fuses and circuit protection components, for applications requiring consistent, dependable fuse performance.

Technical Specifications

  • Voltage Rating: 125V
  • Amp Rating Options: 0.8A, 1.5A, 1.6A
  • Series: FNA-1 (Fusetron)
  • Fuse Type: Midget Time-Delay (TD)

Typical Applications

  • Control Circuit Overcurrent Protection
  • Control Transformer Protection
  • Midget Fuse Holders and Fuse Blocks
  • Commercial and Industrial Electrical Equipment
  • Panelboard and Control Panel Fuse Protection
  • OEM Equipment Circuit Protection

Why Bussmann?

Bussmann is a widely recognized manufacturer of fuses and circuit protection components used across commercial, industrial, and OEM electrical systems. The FNA-1 Series Midget Time-Delay Fuse reflects Bussmann's focus on dependable overcurrent protection, combining a compact midget fuse form factor with time-delay (TD) performance rated for 125V applications across a range of amp ratings from 0.8A to 1.6A. Choosing Bussmann fuse products helps electrical professionals maintain consistent, code-compliant circuit protection across control circuits and equipment that depend on reliable fuse performance.

Manufacturer Resources

Product Specs

Product Type:
Time-Delay Fuse
Voltage Rating:
125V
Series:
FNA-1
Configuration:
Midget Time-Delay
Department:
Electrical
Product Subgroup:
Fuses
list_batch:
BUSS-20260919
Product Group:
Circuit Protection

Bussmann FNA-1-6/10 – Frequently Asked Questions

1) What amp ratings does the Bussmann FNA-1 midget time-delay fuse come in?
Three ratings in the FNA-1 group: 0.8A (FNA-8/10), 1.5A (FNA-1-1/2), and 1.6A (FNA-1-6/10). Bussmann writes the fractional amp ratings into the part number itself, so 8/10 is 0.8A and 1-6/10 is 1.6A. Match the rating to the circuit you are protecting rather than to the holder size, since all three share the same midget body.
2) Will an FNA-1 fuse fit a standard midget fuse holder or fuse block?
Yes. The FNA-1 is a midget-form fuse sized for standard midget fuse holders, fuse blocks, and disconnect switches, which is why it gets used in control panels where there is no room for a larger class fuse. The form factor is the same across all three amp ratings, so you can change ratings without changing the block.
3) Can I use a 125V fuse like the FNA-1 on a 240V control circuit?
No. The FNA-1 is rated 125V, and a fuse must be applied at or above the circuit voltage, not below it. On a 240V or 480V control circuit you need a midget fuse with a matching higher voltage rating. The FNA-1 is intended for 125V control circuits, control transformer primaries and secondaries at that voltage, and similar low-voltage equipment protection.
4) Why pick a time-delay fuse instead of a fast-acting one for a control transformer?
Control transformers draw a heavy inrush for a few cycles when they energize. A fast-acting midget fuse sized close to the steady-state load will often open on that inrush. The FNA-1 is a time-delay (TD) design that rides through brief inrush and short overloads but still opens on a sustained overcurrent or fault, so you can size it near the running load without nuisance blowing. For semiconductor or solid-state protection you want a fast-acting fuse instead.
5) Is the FNA-1 the same as a Fusetron fuse?
Yes, FNA-1 is part of the Bussmann Fusetron line of midget time-delay fuses. If a panel schedule or an OEM manual calls out a Fusetron FNA fuse at 125V, FNA-1 series parts are that family. Order by the full designation, for example FNA-1-1/2 for 1.5A, since the amp rating is carried in the part number.
6) I need a fraction of an amp of protection in a tight control panel. Is this the right fuse family?
For 125V control circuits in the sub-2 amp range, yes. The FNA-1 group covers 0.8A, 1.5A, and 1.6A in a compact midget body, which is what makes it workable in panelboards and control enclosures where mounting space is limited. Typical uses are control circuit overcurrent protection, control transformer protection, and OEM equipment circuits.
7) What is the difference between FNA-1-1/2 and FNA-1-6/10?
Only the amp rating. FNA-1-1/2 is 1.5A and FNA-1-6/10 is 1.6A. Both are 125V midget time-delay fuses in the same body, so they are interchangeable mechanically in the same holder. The 0.1A difference matters where you are trying to coordinate closely with a small control transformer, so use whichever rating the equipment nameplate or panel schedule calls out.
How fast can I get the Bussmann FNA-1-6/10 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 FNA-1-6/10 come with a warranty?
Absolutely. The Bussmann FNA-1-6/10 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 FNA-1-6/10?
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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