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Eaton MDL-3-R 3 A Glass Tube Fuse, Slow-Blow, 250 Vac
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pEaton MDL-3-R — 3 A, 250 V, time-delay glass cartridge fuse, 100 A at 250 Vac; 10,000 A at 125 Vac interrupting./p
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Eaton MDL-3-R 3 A Glass Tube Fuse, Slow-Blow, 250 Vac
Eaton MDL-3-R 3 A Glass Tube Fuse, Slow-Blow, 250 Vac belongs to the Eaton range. It carries 3 A, rated 250 Vac, uses a slow-blow element, in a glass body.
Technical Data
| Parameter | Rating |
|---|---|
| Part number | MDL-3-R |
| AC interrupting rating | 100 A at 250 Vac; 10,000 A at 125 Vac |
| Rated current | 3 A |
| Voltage rating | 250 Vac |
| Typical DC cold resistance | 0.057 Ω |
| Typical voltage drop | 0.345 V |
| End caps | nickel-plated brass |
| Design standard | UL 248-14 |
| Element | single element |
| Body | Glass tube, 1/4 x 1-1/4 in (6.4 x 31.7 mm) |
| Typical melting I2t | 67.5 A²s |
Design Notes
- Interrupting capability is 100 A at 250 Vac; 10,000 A at 125 Vac — confirm the circuit's prospective fault current stays below this.
- 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 250 Vac; a lower-rated part is not a safe substitute.
- Do not upsize beyond 3 A to stop nuisance trips — fix the cause instead.
Where It Is Used
Typical places this fuse turns up:
- EV
Common Questions
What are the ratings of the MDL-3-R?
3 A continuous at 250 Vac, interrupting rating 100 A at 250 Vac; 10,000 A at 125 Vac.
Is the MDL-3-R fast-acting or time-delay?
It is slow-blow. It tolerates short inrush surges.
Can the MDL-3-R be used on a higher fault-current circuit?
No — its interrupting rating is 100 A at 250 Vac; 10,000 A at 125 Vac. Choose a part whose breaking capacity exceeds the prospective fault current.
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