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Eaton 6125FA4A 4 A Ceramic Fuse 125 Vac, Quick-Blow
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pEaton 6125FA4A — 4 A, 125 V, fast-acting ceramic cartridge fuse, 50 A at 125 Vac; 300 A at 125 Vdc; 10,000 A at 86 Vdc interrupting./p
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Eaton 6125FA4A 4 A Ceramic Fuse 125 Vac, Quick-Blow
Built by Eaton, the 6125FA4A carries 4 A, rated 125 Vac / 125 Vdc / 86 Vdc, in a ceramic body.
Technical Data
| Parameter | Rating |
|---|---|
| Part number | 6125FA4A |
| Ordering code | TR2/6125FA4A |
| Packaging | 5,000 pcs on 12 mm tape-and-reel, 13 in (330 mm) reel, EIA-481 |
| Design standard | EIA/IS-722 |
| Terminations | nickel/silver plated end terminations, solder immersion compatible |
| Interrupting rating | 50 A at 125 Vac; 300 A at 125 Vdc; 10,000 A at 86 Vdc |
| Typical cold resistance | 0.022 Ω |
| Typical voltage drop | 0.13 V |
| Rated current | 4 A |
| Typical melting I2t | 4.4 A²s |
| Package | 6.3 x 2.5 mm (2410 imperial / 6125 metric) |
| Voltage rating | 125 Vac / 125 Vdc / 86 Vdc |
| Agency approval | CSA component acceptance 053787 C 000, Class 1422-30; UL Recognition Guide JDYX2, File E19180 |
Selection Notes
- Interrupting capability is 50 A at 125 Vac; 300 A at 125 Vdc; 10,000 A at 86 Vdc — confirm the circuit's prospective fault current stays below this.
- Ceramic body holds higher breaking capacity than glass at the same footprint.
- It is the usual choice where prospective fault current is high.
- Working voltage must stay at or below 125 Vac / 125 Vdc / 86 Vdc; a lower-rated part is not a safe substitute.
- Do not upsize beyond 4 A to stop nuisance trips — fix the cause instead.
Typical Applications
Engineers usually specify it for these duties:
- EV
Part Number and Packing
Order code 6125FA4A from Eaton, supplied in 6.3 x 2.5 mm (2410 imperial / 6125 metric). Confirm the exact suffix before release.
Q&A
What are the ratings of the 6125FA4A?
4 A continuous at 125 Vac / 125 Vdc / 86 Vdc, interrupting rating 50 A at 125 Vac; 300 A at 125 Vdc; 10,000 A at 86 Vdc.
Can the 6125FA4A be used on a higher fault-current circuit?
No — its interrupting rating is 50 A at 125 Vac; 300 A at 125 Vdc; 10,000 A at 86 Vdc. Choose a part whose breaking capacity exceeds the prospective fault current.
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