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Eaton GMC-1-R 1 A Fuse 250 Vac Medium Delay (5 x 20 mm)
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pEaton GMC-1-R — 1 A, 250 V, fuse, 5 x 20 mm, 35 A at 250 Vac; 10,000 A at 125 Vac interrupting./p
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Eaton GMC-1-R 1 A Fuse 250 Vac Medium Delay (5 x 20 mm)
The GMC-1-R from Eaton carries 1 A, rated 250 Vac, uses a time-delay element, measuring 5 x 20 mm.
Technical Data
| Parameter | Rating |
|---|---|
| Part number | GMC-1-R |
| Typical melting I2t | 1.8 A²s |
| Maximum voltage drop | 250 mV |
| Design standard | UL/CSA 248-14 |
| End caps | nickel-plated brass |
| AC interrupting rating | 35 A at 250 Vac; 10,000 A at 125 Vac |
| Body | Glass tube, 5 x 20 mm |
| Rated current | 1 A |
| Typical DC cold resistance | 0.156 Ω |
| Element | single element |
| Voltage rating | 250 Vac |
Practical 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.
- 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.
- Footprint 5 x 20 mm — check clip or holder compatibility before substitution.
- Working voltage must stay at or below 250 Vac; a lower-rated part is not a safe substitute.
- Do not upsize beyond 1 A to stop nuisance trips — fix the cause instead.
Application Scenarios
Common installation contexts include:
- EV
- adapter
- surge
Questions and Answers
What are the ratings of the GMC-1-R?
1 A continuous at 250 Vac, interrupting rating 35 A at 250 Vac; 10,000 A at 125 Vac.
Is the GMC-1-R fast-acting or time-delay?
It is time-delay. It tolerates short inrush surges.
What size is the GMC-1-R?
It measures 5 x 20 mm. Match the holder or clip to this footprint.
Can the GMC-1-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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