Bussmann FRS-R Series Fusetron...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$72.03
Bussmann FRS-R Series Fusetron Dual-Element Time-Delay Fuse

Bussmann FRS-R Series Fusetron Dual-Element Time-Delay Fuse

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Model: FRS-R-2-1/2

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

$72.03
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Bussmann FRS-R Series Fusetron Dual-Element Time-Delay Fuse, 600V

The Bussmann FRS-R Series Fusetron fuse is a dual-element, time-delay fuse platform designed to deliver dependable overcurrent protection in electrical systems rated up to 600V. This listing covers the FRS-R Fusetron family in fractional amperage ratings from 1.6A to 2.5A, giving electrical contractors, panel builders, and maintenance technicians a compact, code-ready fuse option for lower-amperage branch circuits, control circuits, and equipment protection applications. Every fuse in the FRS-R Series pairs a fast-acting short-circuit element with a thermal time-delay element, allowing the fuse to ride through momentary current surges and motor inrush events while still opening reliably under sustained overload conditions. Because nuisance-trip resistance is a defining trait of the Fusetron design, these fuses are widely specified anywhere consistent, predictable protective performance is a priority. Select the specific amperage rating you need—1.6A or 2.5A—from the available options on this page.

Key Features

  • Voltage Rating: Rated 600V, making this fuse suitable for a broad range of circuit voltages up to 600V.
  • Amperage Range: Available in fractional ratings from 1.6A to 2.5A, sized for lower-current branch, control, and instrumentation circuit protection.
  • Fusetron Dual-Element Design: Combines a fast-acting overcurrent element with a thermal time-delay element to resist nuisance openings caused by temporary inrush or surge currents.
  • FRS-R Series Platform: Built on Bussmann's FRS-R fuse platform for consistent, repeatable protective performance across demanding electrical environments.
  • Compact Form Factor: Sized for standard fuse holders and fuse blocks used in panelboards, disconnects, and control enclosures.
  • Bussmann Manufacturing: Produced by Bussmann, a long-established manufacturer of circuit protection components for commercial, industrial, and OEM electrical systems.

Technical Specifications

  • Amperage Rating: 1-6/10A

Manufacturer Resources

Product Specs

Product Type:
Time-Delay Fuse
Voltage Rating:
600V
Series:
FRS-R
Department:
Electrical
Product Subgroup:
Fuses
list_batch:
BUSS-20260919
Product Group:
Circuit Protection

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

1) What amp ratings does the Bussmann FRS-R Fusetron fuse come in?
Two fractional ratings are offered on the FRS-R Fusetron: 1.6A, ordered as FRS-R-1-6/10, and 2.5A, ordered as FRS-R-2-1/2. Both are 600V rated. Bussmann prints fractional amps as fractions, so 1-6/10 on the label is the same as 1.6A and 2-1/2 is 2.5A, which is worth knowing if you are matching a fuse already in the holder.
2) Can I use a 600V FRS-R fuse on a 240V or 480V circuit?
Yes. The 600V rating on the FRS-R Fusetron is a maximum, so it covers circuits at or below 600V, including 120V, 240V and 480V control and branch circuits. A fuse's voltage rating is a ceiling on the system it can safely interrupt, not a required operating voltage.
3) Why choose a dual-element time-delay fuse instead of a fast-acting one for a motor circuit?
Motor and transformer inrush will blow a fast-acting fuse sized for the running load. The FRS-R Fusetron carries two elements: a short-circuit element that clears faults quickly, and a thermal time-delay element that lets the fuse ride through momentary surges and motor starting current while still opening on a sustained overload. If your circuit has no inrush at all, such as a purely resistive or electronic load where you want the fastest clearing possible, a fast-acting fuse is the better choice.
4) Are these FRS-R fuses right for small control and instrumentation circuits?
That is exactly what the 1.6A and 2.5A ratings are for. At those fractional currents you are protecting control transformers, relay and PLC circuits, instrumentation, and small equipment branch circuits rather than feeders. For larger motor branch loads you would move up the FRS-R range to a higher amp rating.
5) Will an FRS-R fuse fit a standard fuse block or disconnect?
The FRS-R Fusetron is built to drop into the standard fuse holders and fuse blocks used in panelboards, disconnects, and control enclosures. Match the amp rating and the holder class the enclosure was built for, since the fuse body and ferrule dimensions on a class-rated holder are what physically limit what will seat.
6) My FRS-R fuse keeps blowing on startup but the equipment runs fine. What does that mean?
A time-delay Fusetron opening during starting usually means the amp rating is undersized for the inrush, not that the fuse is faulty, since the thermal element is built to ride through momentary surge and motor inrush. Confirm the running current and inrush against the rating you installed, and step up within the FRS-R range if the fuse is sized too close to the load. If it opens while running steadily, treat it as a real sustained overload and check the load.
7) Can I mix a 1.6A and a 2.5A FRS-R fuse in the same three-phase disconnect?
No. All poles of a multi-phase disconnect should carry the same fuse type and the same amp rating, so order three of the FRS-R-1-6/10 or three of the FRS-R-2-1/2, not a mix. Mismatched ratings give you single-phasing on an overload, which is hard on a motor.
How fast can I get the Bussmann FRS-R-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 FRS-R-2-1/2 come with a warranty?
Absolutely. The Bussmann FRS-R-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 FRS-R-2-1/2?
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