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Eaton GMD-4-R 4 A Glass Tube Fuse, Slow-Blow, 250 Vac
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pEaton GMD-4-R — 4 A, 250 V, time-delay glass cartridge fuse, 200 A at 250 Vac; 10,000 A at 125 Vac interrupting./p
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Eaton GMD-4-R 4 A Glass Tube Fuse, Slow-Blow, 250 Vac
Eaton GMD-4-R 4 A Glass Tube Fuse, Slow-Blow, 250 Vac belongs to the Eaton range. It carries 4 A, rated 250 Vac, uses a slow-blow element, in a glass body.
Technical Data
| Parameter | Rating |
|---|---|
| Part number | GMD-4-R |
| Design standard | UL/CSA 248-14 |
| Element | single element |
| AC interrupting rating | 200 A at 250 Vac; 10,000 A at 125 Vac |
| Body | Glass tube, 5 x 20 mm |
| Maximum voltage drop | 190 mV |
| Rated current | 4 A |
| Voltage rating | 250 Vac |
| End caps | nickel-plated brass |
| Typical melting I2t | 300 A²s |
| Typical DC cold resistance | 0.28 Ω |
Design Notes
- Interrupting capability is 200 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 4 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 GMD-4-R?
4 A continuous at 250 Vac, interrupting rating 200 A at 250 Vac; 10,000 A at 125 Vac.
Is the GMD-4-R fast-acting or time-delay?
It is slow-blow. It tolerates short inrush surges.
Can the GMD-4-R be used on a higher fault-current circuit?
No — its interrupting rating is 200 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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