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Eaton GMC-300-R 300 mA Glass Fuse 250 Vac, Medium Delay
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pEaton GMC-300-R — 300 mA, 250 V, glass cartridge fuse, 35 A at 250 Vac; 10,000 A at 125 Vac interrupting./p
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Eaton GMC-300-R 300 mA Glass Fuse 250 Vac, Medium Delay
Eaton GMC-300-R 300 mA Glass Fuse 250 Vac, Medium Delay belongs to the Eaton range. It carries 300 mA, rated 250 Vac, uses a time-delay element, in a glass body.
Technical Data
| Parameter | Rating |
|---|---|
| Part number | GMC-300-R |
| Rated current | 300 mA |
| Typical DC cold resistance | 0.838 Ω |
| Design standard | UL/CSA 248-14 |
| End caps | nickel-plated brass |
| Typical melting I2t | 0.081 A²s |
| Element | single element |
| Voltage rating | 250 Vac |
| Body | Glass tube, 5 x 20 mm |
| AC interrupting rating | 35 A at 250 Vac; 10,000 A at 125 Vac |
| Maximum voltage drop | 580 mV |
Design 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.
- 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 300 mA to stop nuisance trips — fix the cause instead.
Where It Is Used
Typical places this fuse turns up:
- EV
- adapter
- surge
Common Questions
What are the ratings of the GMC-300-R?
300 mA continuous at 250 Vac, interrupting rating 35 A at 250 Vac; 10,000 A at 125 Vac.
Is the GMC-300-R fast-acting or time-delay?
It is time-delay. It tolerates short inrush surges.
Can the GMC-300-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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