Bussmann Fusetron FRN-R Series...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$35.21
Bussmann Fusetron FRN-R Series Dual-Element Fuse, 250V

Bussmann Fusetron FRN-R Series Dual-Element Fuse, 250V

(No reviews yet) Write a Review

Model: FRN-R-6-1/4

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

$35.21
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Bussmann Fusetron FRN-R Series Dual-Element Fuse, 250V

The Bussmann Fusetron FRN-R Series is a family of dual-element, time-delay fuses rated 250V, offered across a range of amperage ratings including 2.25 Amp, 2.5 Amp, 3.5 Amp, and 6.25 Amp so the correct current rating can be selected for the specific circuit being protected. Manufactured by Bussmann under the Fusetron designation, these fuses are built to protect wiring, equipment, and connected loads by interrupting current flow when a fault or overload condition develops. Each fuse in the FRN-R Series shares the same 250V voltage rating and Fusetron form factor, with the amperage rating selected at time of order to match the exact requirement of the fuse holder or equipment being serviced. This series is intended as a direct replacement for applications and fuse holders originally designed around the Bussmann FRN-R model number, voltage rating, and the specific amperage called for by the equipment nameplate.

Key Features

  • Amperage Rating Range: Available in 2.25 Amp, 2.5 Amp, 3.5 Amp, and 6.25 Amp ratings to match the exact current requirement of the circuit.
  • Voltage Rating: Rated 250V per the Fusetron 250V manufacturer designator, suitable for circuits operating at or below this voltage.
  • Fusetron Series: Part of the Bussmann Fusetron FRN-R fuse line, a dual-element, time-delay fuse family.
  • Bussmann Manufactured: Produced by Bussmann, a manufacturer of circuit protection components for electrical distribution systems.
  • Exact Model Match: Sized and rated to match the FRN-R designation for use where this specific Bussmann Fusetron series is specified by equipment or panel manufacturers.
  • Replacement Part: Suited for use as a direct replacement in fuse holders and panelboards designed for the FRN-R rating and form factor.
  • Form Factor: Physical size and mounting are consistent across the FRN-R series for compatibility with fuse holders designed for this Bussmann Fusetron model line.

Technical Specifications

  • Amperage Rating: 2-1/2A (selectable option; series spans 2.25 Amp to 6.25 Amp)

Typical Applications

  • Overcurrent Protection in Electrical Circuits
  • Fuse Replacement in Panelboards and Fuse Holders Rated for 250V
  • Commercial and Industrial Electrical Distribution Systems
  • Equipment and Wiring Protection Against Overload Conditions
  • Circuits Requiring a 250V Fusetron Fuse in a Specific Amperage
  • Replacement Fuse Ordering by Exact Bussmann Model Number and Amperage

Why Bussmann?

Bussmann is a recognized manufacturer of circuit protection products, and the Fusetron FRN-R Series reflects that focus with a clearly defined 250V rating across a range of amperage options sized to the demands of the circuit being protected. Choosing a genuine Bussmann FRN-R Fusetron fuse in the correct amperage helps ensure the right fit, voltage rating, and current rating when replacing fuses in systems designed around Bussmann Fusetron components. Specifying the exact FRN-R model number and amperage helps maintain the intended level of circuit protection in the application. For technicians and facility teams standardizing on Bussmann circuit protection, the Fusetron FRN-R Series offers a straightforward match to the 250V requirement across the available amperage ratings.

Manufacturer Resources

Product Specs

Product Type:
Time-Delay Fuse
Voltage Rating:
250V
Series:
Fusetron FRN-R
Department:
Electrical
Product Subgroup:
Fuses
list_batch:
BUSS-20260919
Product Group:
Circuit Protection

Bussmann FRN-R-6-1/4 – Frequently Asked Questions

1) What amp ratings does the Bussmann Fusetron FRN-R 250V fuse come in?
Four fractional-amp ratings in this group: 2.25 amp (FRN-R-2-1/4), 2.5 amp (FRN-R-2-1/2), 3.5 amp (FRN-R-3-1/2), and 6.25 amp (FRN-R-6-1/4). Pick the rating off the equipment nameplate or the existing fuse, not by rounding up to the next whole amp. All four share the same 250V rating.
2) Can I use an FRN-R fuse on a 480V circuit?
No. The Fusetron FRN-R is a 250V fuse and should only go in circuits operating at or below 250 volts. For a 600V class RK5 circuit you need the FRS-R equivalent instead, which is the 600V member of the Fusetron line.
3) Will an FRN-R drop into the same fuse clips as the fuse I am pulling out?
Physical size and mounting are consistent across the FRN-R line, so any of the four ratings fits a holder built for the FRN-R form factor. It is a direct replacement where the equipment or panelboard calls out the FRN-R model number at 250V. In the low fractional ratings covered here the body is the small 250V cartridge size, so match the amperage to the holder and nameplate rather than assuming a larger FRN-R will seat in the same clips.
4) Can I put a 6.25 amp FRN-R in place of a 2.5 amp one to stop it blowing?
No. Going up in amperage removes the protection the circuit was designed around and leaves the wiring and connected equipment unprotected. Replace like for like, 2.5 amp with FRN-R-2-1/2. Repeated blowing is a fault or overload to be traced, not a sizing problem.
5) Why is a dual-element time-delay fuse used instead of a fast-acting one on motor circuits?
A dual-element time-delay fuse like the Fusetron FRN-R rides through the brief inrush current a motor or transformer draws at startup, then still opens on a sustained overload or a short. A fast-acting fuse of the same amp rating would nuisance-blow on that inrush. If the load is purely electronic or resistive and you need fast clearing, a non-time-delay fuse of the same class is the better choice.
6) What do I need to tell my supplier to get the right FRN-R fuse?
Two things: the series designation FRN-R and the amperage. The amperage is the only ordering option, so the full part number resolves to one of FRN-R-2-1/4, FRN-R-2-1/2, FRN-R-3-1/2, or FRN-R-6-1/4. The 250V rating is fixed across the series, so there is no voltage choice to make.
7) Is the Fusetron FRN-R suitable for control circuits in a commercial panelboard?
Yes, within its limits. The FRN-R is used for overcurrent protection in commercial and industrial distribution, including fuse replacement in panelboards and fuse holders rated 250V, and for protecting wiring and connected loads against overload. The low fractional ratings, 2.25 through 6.25 amp, are the sizes typically pulled for control transformers and small motor loads.
How fast can I get the Bussmann FRN-R-6-1/4 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 FRN-R-6-1/4 come with a warranty?
Absolutely. The Bussmann FRN-R-6-1/4 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 FRN-R-6-1/4?
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 FRN-R-6-1/4 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!