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Eaton GMD-400-R Slow-Blow Glass Fuse 400 mA 250 Vac
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pEaton GMD-400-R — 400 mA, 250 V, time-delay glass cartridge fuse, 35 A at 250 Vac; 10,000 A at 125 Vac interrupting./p
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Eaton GMD-400-R Slow-Blow Glass Fuse 400 mA 250 Vac
Built by Eaton, the GMD-400-R carries 400 mA, rated 250 Vac, uses a slow-blow element, in a glass body.
Technical Data
| Parameter | Rating |
|---|---|
| Part number | GMD-400-R |
| End caps | nickel-plated brass |
| Rated current | 400 mA |
| Element | single element |
| Maximum voltage drop | 600 mV |
| Design standard | UL/CSA 248-14 |
| Typical DC cold resistance | 0.948 Ω |
| AC interrupting rating | 35 A at 250 Vac; 10,000 A at 125 Vac |
| Voltage rating | 250 Vac |
| Typical melting I2t | 1.2 A²s |
| Body | Glass tube, 5 x 20 mm |
Selection Notes
- Interrupting capability is 35 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 400 mA 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 GMD-400-R?
400 mA continuous at 250 Vac, interrupting rating 35 A at 250 Vac; 10,000 A at 125 Vac.
Is the GMD-400-R fast-acting or time-delay?
It is slow-blow. It tolerates short inrush surges.
Can the GMD-400-R be used on a higher fault-current circuit?
No — its interrupting rating is 35 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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