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Eaton 1025FA12-R 12 A Fast-Blow Fuse, Ceramic, 10.29 x 2.77 mm
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pEaton 1025FA12-R — 12 A, 60 V, fast-acting ceramic cartridge fuse, 10.29 x 2.77 mm, 50 A AC interrupting./p
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Eaton 1025FA12-R 12 A Fast-Blow Fuse, Ceramic, 10.29 x 2.77 mm
The 1025FA12-R from Eaton carries 12 A, rated 60 Vdc, uses a fast-acting element, in a ceramic body, measuring 29 x 2.77 mm.
Technical Data
| Parameter | Rating |
|---|---|
| Part number | 1025FA12-R |
| Ordering code | TR2/1025FA12-R |
| Packaging | 2,500 pcs on 24 mm tape-and-reel, 13 in (330 mm) reel, EIA-481 |
| Typical melting I2t | 498 A²s |
| Design standard | EIA/IS-722 |
| Terminations | silver-plated end terminations, solder immersion compatible |
| Agency approval | UL Recognition, Guide JDYX2, File E19180 (250 mA - 15 A); CSA component acceptance |
| Typical cold resistance | 0.0056 Ω |
| Voltage rating, DC | 60 Vdc |
| Rated current | 12 A |
| Typical voltage drop | 120 mV |
| Interrupting rating | 50 A AC |
| Package | 10.29 x 2.77 mm (4010 imperial / 1025 metric) |
| Voltage rating | 250 Vac |
Practical Notes
- Interrupting capability is 50 A AC — confirm the circuit's prospective fault current stays below this.
- Fast element suits resistive and semiconductor loads rather than motors with high inrush.
- Because it opens within milliseconds, downstream semiconductors see less let-through energy.
- Ceramic body holds higher breaking capacity than glass at the same footprint.
- It is the usual choice where prospective fault current is high.
- Footprint 29 x 2.77 mm — check clip or holder compatibility before substitution.
- Working voltage must stay at or below 60 Vdc; a lower-rated part is not a safe substitute.
- Do not upsize beyond 12 A to stop nuisance trips — fix the cause instead.
Application Scenarios
Common installation contexts include:
- EV
Buying Notes
Order code 1025FA12-R from Eaton, supplied in 10.29 x 2.77 mm (4010 imperial / 1025 metric). Confirm the exact suffix before release.
Questions and Answers
What are the ratings of the 1025FA12-R?
12 A continuous at 60 Vdc, interrupting rating 50 A AC.
Is the 1025FA12-R fast-acting or time-delay?
It is fast-acting. Expect it to open quickly on overload.
What size is the 1025FA12-R?
It measures 29 x 2.77 mm. Match the holder or clip to this footprint.
Can the 1025FA12-R be used on a higher fault-current circuit?
No — its interrupting rating is 50 A AC. Choose a part whose breaking capacity exceeds the prospective fault current.
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