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Eaton MDQ-8 8 A Glass Fuse 32 Vac, Two-Element Time-Delay
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pEaton MDQ-8 — 8 A, 32 V, time-delay glass cartridge fuse, 1,000 A at 32 Vac interrupting./p
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Eaton MDQ-8 8 A Glass Fuse 32 Vac, Two-Element Time-Delay
Built by Eaton, the MDQ-8 carries 8 A, rated 32 Vac, uses a time-delay element, in a glass body.
Technical Data
| Parameter | Rating |
|---|---|
| Part number | MDQ-8 |
| Breaking capacity | 35 A at 250 Vac up to 1 A, 100 A to 7 A, 1,000 A at 32 V above |
| Body | Glass tube, 1/4 x 1-1/4 in (6.3 x 32 mm) |
| Typical DC cold resistance | 0.012 Ω |
| End caps | nickel-plated brass |
| Element | dual element |
| Voltage rating | 32 Vac |
| Rated current | 8 A |
| AC interrupting rating | 1,000 A at 32 Vac |
| Design standard | UL 248-14 |
Selection Notes
- Interrupting capability is 1,000 A at 32 Vac — confirm the circuit's prospective fault current stays below this.
- Time-delay element rides through motor starting and capacitive inrush without nuisance opening.
- Startup surges of several times rated current are tolerated for a short window.
- Glass body lets you inspect the element after a fault.
- Best kept for lower fault-current circuits where visual diagnosis matters.
- Working voltage must stay at or below 32 Vac; a lower-rated part is not a safe substitute.
- Do not upsize beyond 8 A to stop nuisance trips — fix the cause instead.
Typical Applications
Engineers usually specify it for these duties:
- EV
- surge
Q&A
What are the ratings of the MDQ-8?
8 A continuous at 32 Vac, interrupting rating 1,000 A at 32 Vac.
Is the MDQ-8 fast-acting or time-delay?
It is time-delay. It tolerates short inrush surges.
Can the MDQ-8 be used on a higher fault-current circuit?
No — its interrupting rating is 1,000 A at 32 Vac. Choose a part whose breaking capacity exceeds the prospective fault current.
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