Eaton 1025FA500-R 500 mA Fast-Blow Fuse - 10.29 x 2.77 mm, 250 Vac
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Eaton 1025FA500-R 500 mA Fast-Blow Fuse - 10.29 x 2.77 mm, 250 Vac
Technical Data
| Parameter | Rating |
|---|---|
| Part number | 1025FA500-R |
| Ordering code | TR2/1025FA500-R |
| Packaging | 2,500 pcs on 24 mm tape-and-reel, 13 in (330 mm) reel, EIA-481 |
| Package | 10.29 x 2.77 mm (4010 imperial / 1025 metric) |
| Typical voltage drop | 1,500 mV |
| Design standard | EIA/IS-722 |
| Rated current | 500 mA |
| Voltage rating, DC | 125 Vdc |
| Terminations | silver-plated end terminations, solder immersion compatible |
| Typical melting I2t | 0.0415 A²s |
| Typical cold resistance | 1.15 Ω |
| Interrupting rating | 50 A AC; 50 A 125 Vdc |
| Agency approval | UL Recognition, Guide JDYX2, File E19180 (250 mA - 15 A); CSA component acceptance |
| Voltage rating | 250 Vac |
Practical Notes
- Interrupting capability is 50 A AC; 50 A 125 Vdc — 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.
- Footprint 29 x 2.77 mm — check clip or holder compatibility before substitution.
- Working voltage must stay at or below 125 Vdc; a lower-rated part is not a safe substitute.
- Do not upsize beyond 500 mA to stop nuisance trips — fix the cause instead.
Application Scenarios
Common installation contexts include:
- EV
Buying Notes
Order code 1025FA500-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 1025FA500-R?
500 mA continuous at 125 Vdc, interrupting rating 50 A AC; 50 A 125 Vdc.
Is the 1025FA500-R fast-acting or time-delay?
It is fast-acting. Expect it to open quickly on overload.
What size is the 1025FA500-R?
It measures 29 x 2.77 mm. Match the holder or clip to this footprint.
Can the 1025FA500-R be used on a higher fault-current circuit?
No — its interrupting rating is 50 A AC; 50 A 125 Vdc. Choose a part whose breaking capacity exceeds the prospective fault current.
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