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Bussmann MDQ-V Series Time-Delay Fuse, Dual-Element Glass Tube
Model: BUS-MDQ-V
Bussmann MDQ-V Series Time-Delay Fuse, Dual-Element Glass TubeThe Bussmann MDQ-V Series is a dual-element, time-delay fuse engineered for electronic relay and control circuit protection. Built with a...
Bussmann
Starting at
$47.98
Bussmann MDQ Series Dual-Element Time-Delay Fuse, Ferrule Terminals
The Bussmann MDQ Series Dual-Element Time-Delay Fuse from Eaton Bussmann is built for electronic relay and control circuits, pairing a glass tube body with nickel-plated brass endcaps for dependable, non-indicating overcurrent protection. Terminated ferrule end X ferrule end for use with axial lead-style holders, this compact dual-element fuse measures .25 IN wide by 1.25 IN long and 1.25 IN high. The MDQ Series is available in amp ratings from 5A to 12A, giving engineers flexibility to match protection levels across a range of low-current control applications.
Key Features
- Compact Dimensions: .25 IN width by 1.25 IN length and 1.25 IN height, sized for space-constrained enclosures.
- Durable Construction: Glass tube body with nickel-plated brass endcaps resists corrosion and allows visual element inspection.
- Ferrule End Connections: Ferrule end X ferrule end termination for use with axial lead-style fuse holders and clips.
- Dual-Element Design: Two internal elements deliver time-delay response to momentary inrush without nuisance opening.
- Time-Delay Response: Opens in 60 min maximum at 135% of rated current and 120 s maximum at 200% of rated current.
- Amp Rating Range: Available in 5A, 6A, 7A, and 12A ratings to match a range of control-circuit loads.
- Non-Indicating: Standard non-indicating design for straightforward, economical circuit protection.
Technical Specifications
- Connection: Ferrule end X ferrule end
- Product Width: .25 IN
- Packaging Type: Standard
- Fuse Indicator: Non Indicating
- Product Length: 1.25 IN
- Response Time: 60 min maximum at 135%, 120 s maximum at 200%
- Material Type: Glass tube with nickel-plated brass endcaps
- Product Height: 1.25 IN
- Used With: out Axial Leads
- Application: Electronic relay and control circuits
- Product Type: Electronic- small dimension
- Product Details: Electronic- small dimension
- Number Of Elements: Dual
Typical Applications
- Electronic Relay and Control Circuits
- Low-Current Instrumentation Panels
- Control Transformer Secondary Protection
- OEM Equipment and Panel Manufacturing
- Renovation and New Construction Panel Upgrades
Why Bussmann?
Bussmann by Eaton builds the MDQ Series with a glass tube and nickel-plated brass endcap construction that supports dependable, repeatable time-delay performance across its full 5A-12A rating range. The dual-element design and ferrule end terminations make it a straightforward, code-appropriate choice for engineers protecting electronic relay and control circuitry.
Manufacturer Resources
Product Specs
- Connection:
- Ferrule end X ferrule end
- Product Width:
- .25 IN
- Packaging Type:
- Standard
- Fuse Indicator:
- Non Indicating
- Department:
- Electrical
- Product Group:
- Fuses
- Product Length:
- 1.25 IN
- Response Time:
- 60 min maximum at 135%, 120 s maximum at 200%
- Material Type:
- Glass tube with nickel-plated brass endcaps
- Product Subgroup:
- Other Fuses
- Product Height:
- 1.25 IN
- Used With:
- out Axial Leads
- Application:
- Electronic relay and control circuits
- Product Type:
- Fuse
- Product Details:
- Electronic- small dimension
- Number Of Elements:
- Dual
- Product Material:
- Glass Tube with Nickel-Plated Brass Endcaps
- Connection Type:
- Ferrule End
- Amperage Rating:
- 5A - 12A
- Series:
- MDQ
Bussmann MDQ-12 – Frequently Asked Questions
1) What amp ratings does the Bussmann MDQ time-delay fuse come in?
The MDQ Series runs from fractional to 15 amps: 0.2A (MDQ-2/10), 0.4A (MDQ-4/10), 0.8A (MDQ-8/10), 1.25A (MDQ-1-1/4), 5A, 6A, 7A, 9A, 10A, 12A and 15A. Order by amp rating, since that is the only thing that changes between part numbers. The MPN carries the rating directly, so MDQ-6 is the 6 amp and MDQ-12 the 12 amp.
2) Why does my control transformer fuse keep blowing on startup, and will a time-delay fuse fix it?
Inrush is the usual cause, and that is exactly what the MDQ dual-element design handles. Two internal elements give it a time-delay curve: it holds for up to 60 minutes at 135 percent of rated current and up to 120 seconds at 200 percent, so a brief magnetizing or motor-start surge rides through instead of opening the fuse. A fast-acting fuse of the same rating will not.
3) Can you tell at a glance if an MDQ fuse has blown?
Not from an indicator, because the MDQ is a non-indicating fuse with no pop-out pin or LED. What you do get is a glass tube body, so you can see the element and usually spot a clear open or a blackened tube visually. For panels where technicians need blown-fuse indication without pulling the fuse, choose an indicating small-dimension fuse instead.
4) Are MDQ fuses suitable for electronic relay and control circuits in a panel?
That is the stated application for the MDQ: electronic relay and control circuits. It is a small-dimension electronic fuse, so it suits control transformer secondaries, instrumentation panels, and OEM equipment builds where currents are low and inrush is present. It is not a branch-circuit or power-distribution fuse.
5) Will the nickel-plated endcaps on an MDQ hold up in a humid or washdown-adjacent enclosure?
The endcaps are nickel-plated brass, which resists corrosion better than bare brass and keeps the contact surface clean where the fuse meets the clip, which is where resistance and heating usually start. The body itself is glass tube, so it should still sit inside an enclosure rather than being exposed to direct moisture or impact.
6) Is the MDQ sold as a single fuse or in a pack?
MDQ fuses use standard packaging and are ordered by individual amp rating part number, such as MDQ-5 for the 5 amp or MDQ-10 for the 10 amp. If you are stocking a panel spares kit, order each rating separately since the ratings are distinct part numbers.
How fast can I get the Bussmann MDQ-12 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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-12 come with a warranty?
Absolutely. The Bussmann MDQ-12 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-12?
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installation tips, and troubleshooting. Contact Us
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