Bussmann MDL-1/2-R Eaton Serie...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$350.47
Bussmann MDL-1/2-R Eaton Series Time-Delay Fuse

Bussmann MDL-1/2-R Eaton Series Time-Delay Fuse

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Model: MDL-3-R

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

$350.47
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Bussmann MDL-1/2-R Eaton Series Time-Delay Fuse, 1/2A

The Bussmann MDL-1/2-R is a time-delay fuse manufactured as part of the Eaton Bussmann series, a widely recognized line of fuses used throughout commercial, industrial, and OEM electrical systems. Designed to provide dependable overcurrent protection, this fuse uses time-delay technology to ride through momentary current surges, such as motor inrush or transformer energization, without opening unnecessarily, while still responding quickly to sustained overload or fault conditions. The MDL-1/2-R model designation identifies this fuse as carrying a 1/2A rating, making it well suited for low-current control circuits, instrumentation loops, and other applications where a precisely sized time-delay fuse is required. As a genuine Eaton Bussmann series component, the MDL-1/2-R is built to the same engineering standards that electrical contractors and maintenance teams depend on for consistent, code-compliant circuit protection. Stocking the correct Bussmann MDL-1/2-R fuse helps ensure fast, accurate replacement when a fuse in this series needs to be swapped in the field.

Key Features

  • Time-Delay Operation: The MDL-1/2-R is engineered with time-delay characteristics that allow it to withstand brief current surges, such as motor starting inrush, without opening, while still providing fast response to true overload and short-circuit conditions.
  • Eaton Bussmann Series: As a member of the Eaton Bussmann series, this fuse is produced under the Bussmann brand's established manufacturing standards, giving specifiers a consistent, trusted option for overcurrent protection across a wide range of equipment and panels.
  • Model Designation MDL-1/2-R: The MDL-1/2-R part number allows for straightforward identification and cross-reference, simplifying fuse replacement in existing holders, blocks, and disconnects that call for this exact model.
  • Amp Rating: Rated at 1/2A, the MDL-1/2-R is sized for low-current circuits such as control wiring and instrumentation, where an appropriately rated time-delay fuse is essential to reliable operation.
  • Genuine Eaton Bussmann Component: Manufactured by Eaton under the Bussmann brand, helping ensure authentic fit, form, and function when specifying a replacement for the MDL-1/2-R fuse.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Motor and Transformer Inrush Current Protection
  • Control Circuit and Instrumentation Protection
  • Commercial and Industrial Electrical Panels
  • Replacement Fuse for Eaton Bussmann Fuse Holders and Blocks

Why Bussmann?

Bussmann fuses, manufactured under the Eaton Bussmann series, have long been a standard reference point for overcurrent protection in professional electrical work. The time-delay design of the MDL-1/2-R reflects the same engineering approach found throughout the Eaton Bussmann series, giving electricians, panel builders, and facility maintenance teams a fuse they can specify with confidence. Choosing genuine Bussmann MDL-1/2-R fuses helps maintain the protection characteristics your equipment and circuits were designed around. For facilities and contractors who require exact fuse replacements, the Bussmann MDL-1/2-R offers a straightforward, trusted option backed by the Eaton Bussmann name.

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
Time-Delay Fuse
Series:
Eaton Bussmann Series
Department:
Electrical
Product Subgroup:
Fuses
list_batch:
BUSS-20260919
Connection Type:
Ferrule
Product Width:
.25 inches
End Type:
Ferrule
Product Group:
Circuit Protection

Bussmann MDL-3-R – Frequently Asked Questions

1) What amp ratings does the Bussmann MDL-R time-delay fuse come in?
Four ratings are offered in the MDL-R glass tube time-delay fuse: 1/2A (MDL-1/2-R), 3A (MDL-3-R), 5A (MDL-5-R) and 6A (MDL-6-R). Pick the rating that matches what came out of the holder, not a larger one, since the fuse is the sized protection for that control or instrumentation circuit.
2) Will the MDL fuse fit a clip-style fuse holder or does it need screw terminals?
The MDL-R fuse has ferrule ends, so it drops into a clip or spring-contact holder or block that grips the metal end caps. It is not a screw-stud or bolt-down fuse. Body width is listed at .25 inches, which is the standard small glass tube diameter used in panel-mount and in-line holders.
3) Can I replace an MDL fuse in an existing Bussmann holder without changing the block?
Yes. The MDL-R is the same ferrule-end glass tube fuse those Eaton Bussmann holders and blocks are built around, so a like-for-like swap by exact model number needs no change to the holder. Match the model designation, for example MDL-5-R for a 5A position, and the holder stays as is.
4) Why use a time-delay fuse instead of a fast-acting one on a control circuit with a transformer?
A control transformer or motor draws a large inrush spike for a few cycles at energization. A fast-acting fuse sized to the running load will clear on that spike. The MDL-R is a time-delay type, built to ride through those momentary surges while still opening on a sustained overload or fault. If your circuit has no inrush, a fast-acting fuse gives faster clearing instead.
5) Is the MDL-1/2-R suitable for an instrumentation loop or is it only for motor circuits?
At 1/2A the MDL-1/2-R is a low-current fuse, intended for control wiring and instrumentation loops as much as for small inductive loads. The larger 3A, 5A and 6A ratings in the same MDL-R family cover heavier control circuits and panel branches.
6) Where do I find the full interrupting rating and voltage data for the MDL-R fuse?
Eaton publishes the complete electrical characteristics for the MDL-R family, including voltage and interrupting ratings and the time-current curves, on the Bussmann spec sheet linked with the product data. For a panel build or a coordination study, work from that sheet rather than from the amp rating alone.
7) Should a facility stock more than one MDL amp rating?
For MRO stock it usually makes sense to carry the ratings actually used in your panels. The MDL-R line runs 1/2A, 3A, 5A and 6A, so a maintenance crib covering low-current control and instrumentation circuits typically holds the 1/2A for metering and loop work and the 3A to 6A sizes for transformer and relay circuits.
How fast can I get the Bussmann MDL-3-R 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 MDL-3-R come with a warranty?
Absolutely. The Bussmann MDL-3-R 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 MDL-3-R?
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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