Bussmann MDQ-1 Series 250V Sma...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$37.24
Bussmann MDQ-1 Series 250V Small-Dimension Time-Delay Fuse

Bussmann MDQ-1 Series 250V Small-Dimension Time-Delay Fuse

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Model: MDQ-1

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

$37.24
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Bussmann MDQ-1 Series 250V Small-Dimension Time-Delay Fuse

The Bussmann MDQ-1 Series 250V Small-Dimension Time-Delay Fuse is an Eaton Bussmann engineered overcurrent protection device built for circuits that demand dependable time-delay performance. Rated at 250V, this small-dimension fuse is designed to protect equipment and wiring from sustained overloads and short-circuit conditions while allowing brief, harmless current surges to pass without nuisance opening. Its compact, small-dimension form factor makes it well suited for space-constrained fuse blocks, control panels, and equipment where a standard-size fuse will not fit. As part of the Eaton Bussmann portfolio, the MDQ-1 is manufactured to consistent quality standards for dependable field performance, and it serves as a direct replacement in applications originally specified for a Bussmann MDQ series time-delay fuse.

Key Features

  • Voltage Rating: 250V rating supports use in standard low-voltage branch circuits and equipment protection applications.
  • Time-Delay Operation: Time-delay fuse element accommodates brief current surges, such as motor start-up or transformer inrush, without nuisance opening.
  • Small-Dimension Design: Compact, small-dimension body fits fuse holders, blocks, and panels where a standard-size fuse cannot be used.
  • Eaton Bussmann Series: Part of the Eaton Bussmann series of fuses engineered for reliable, code-compliant overcurrent protection.
  • MDQ Series Model MDQ-1: Identified within the Bussmann MDQ series of small-dimension, time-delay fuses.
  • Direct Replacement: Suitable as a like-for-like replacement for existing Bussmann MDQ series time-delay fuses in the field.
  • Consistent Manufacturing Quality: Produced under the Eaton Bussmann name for repeatable performance across production runs.

Technical Specifications

  • Voltage Rating: 250V
  • Series: MDQ
  • Fuse Type: Time-Delay

Typical Applications

  • Control Circuit Protection
  • Motor and Transformer Circuit Protection
  • Panelboard and Equipment Overcurrent Protection
  • Commercial and Industrial Electrical Systems
  • Replacement Fuse for Small-Dimension Fuse Holders
  • Original Equipment Manufacturer (OEM) Circuit Designs Specifying a Bussmann MDQ Series Fuse

Why Bussmann?

Bussmann, an Eaton brand, is a recognized name in circuit protection, and the MDQ-1 time-delay fuse reflects that engineering standard with its 250V rating and small-dimension construction. Choosing a Bussmann MDQ series fuse helps ensure correct fit and dependable overcurrent protection for time-delay applications in commercial and industrial electrical systems. Specifying genuine Eaton Bussmann fuses helps electricians and maintenance teams maintain consistent circuit protection characteristics when replacing fuses in existing equipment, panels, and control circuits.

Manufacturer Resources

Spec Sheet

Product Specs

list_batch:
BUSS-20260919
Product Type:
Time-Delay Fuse
Voltage Rating:
250V
Series:
MDQ
Configuration:
Small-Dimension
Department:
Electrical
Product Subgroup:
Fuses
Product Group:
Circuit Protection
Product Length:
1.25 in
Product Width:
0.25 in
Product Weight:
0.02 lb
Product Height:
1.25 in
Amperage Rating:
1A

Bussmann MDQ-1 – Frequently Asked Questions

1) What voltage is the Bussmann MDQ-1 fuse rated for?
The MDQ-1 is a 250V fuse, which covers standard low-voltage branch circuits and equipment protection. If the circuit you are protecting runs above 250 volts, this is the wrong fuse, you need a higher voltage rated part. Using a lower voltage rated fuse on a higher voltage circuit can prevent it from interrupting a fault safely.
2) Why choose a time-delay fuse like the MDQ-1 instead of a fast-acting fuse?
Time-delay is the right choice when the load draws a brief surge at start-up. The MDQ-1 element rides through motor start-up and transformer inrush without opening, then still clears sustained overloads and short circuits. A fast-acting fuse in that same spot tends to nuisance-blow on every start. If the circuit feeds electronics or a purely resistive load with no inrush, a fast-acting fuse is the better match.
3) What does small-dimension mean on the Bussmann MDQ-1, and will it fit a standard fuse holder?
Small-dimension refers to the compact body, which is made for fuse holders, blocks, and control panels where a standard-size fuse will not physically fit. It is not a substitute for a standard-size fuse clip, so match it to a holder specified for a small-dimension MDQ series fuse.
4) Can I use the MDQ-1 to replace an existing Bussmann MDQ fuse in a panel?
Yes. The MDQ-1 is a like-for-like replacement where a Bussmann MDQ series time-delay fuse was originally specified, including OEM equipment designs built around that series. Keeping the same series preserves the time-delay characteristic the circuit was designed around.
5) What part number do I order for the Bussmann MDQ 250V time-delay fuse?
Order by manufacturer part number MDQ-1, Bussmann (an Eaton brand) MDQ series. That is the identity to quote to a distributor or put on a purchase order so you get the small-dimension 250V time-delay version.
6) Where is the MDQ-1 fuse typically used in a commercial building or plant?
Common spots are control circuits, motor and transformer circuits, panelboard and equipment overcurrent protection, and as the replacement fuse in small-dimension holders throughout commercial and industrial systems. Facility maintenance teams also stock it for OEM equipment whose design calls out an MDQ series fuse.
7) Where can I get the full electrical curves and dimensions for the Bussmann MDQ series?
Eaton publishes a spec sheet for the MDQ series fuse, and the data sheet link is carried with the product record. That document is where to look for the time-current curve and body dimensions before committing to a holder.
How fast can I get the Bussmann MDQ-1 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 MDQ-1 come with a warranty?
Absolutely. The Bussmann MDQ-1 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 MDQ-1?
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 MDQ-1 from ZenSupply?
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