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Eaton 0603HV1.25-R 1.25 A 63 Vdc Fast-Acting Chip SMD Fuse
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pEaton 0603HV1.25-R — 1.25 A, 63 V, fast-acting SMD fuse, 50 A at rated voltage interrupting./p
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Eaton 0603HV1.25-R 1.25 A 63 Vdc Fast-Acting Chip SMD Fuse
Eaton 0603HV1.25-R 1.25 A 63 Vdc Fast-Acting Chip SMD Fuse belongs to the Eaton range. It carries 1.25 A, rated 63 Vdc, uses a fast-acting element, in a chip body.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Eaton / 0603HV Series |
| Part number | 0603HV1.25-R |
| Ordering code | TR-0603HV1-25-R |
| Packaging | 5,000 pcs in paper tape, 178 mm (7 in) reel |
| Fuse characteristic | fast-acting |
| Current rating | 1.25 A |
| Voltage rating | 63 Vdc |
| Interrupting rating | 50 A at rated voltage |
| Typical DC cold resistance | 0.132 Ω |
| Typical pre-arcing I²t | 0.008 A²s |
| Typical voltage drop | 0.201 V |
| Package | 0603 (1608 metric) ceramic chip, surface mount |
| Operating temperature | -55 °C to +125 °C (with derating) |
| Moisture sensitivity | MSL 1 |
| Agency / environmental | UL Recognized file E19180; RoHS compliant and halogen free |
Design Notes
- Interrupting capability is 50 A at rated voltage — 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.
- Working voltage must stay at or below 63 Vdc; a lower-rated part is not a safe substitute.
- Do not upsize beyond 1.25 A to stop nuisance trips — fix the cause instead.
Where It Is Used
Typical places this fuse turns up:
- battery
- EV
- transformer
Ordering Details
Order code 0603HV1.25-R from Eaton, supplied in 0603 (1608 metric) ceramic chip, surface mount. Confirm the exact suffix before release.
Common Questions
What are the ratings of the 0603HV1.25-R?
1.25 A continuous at 63 Vdc, interrupting rating 50 A at rated voltage.
Is the 0603HV1.25-R fast-acting or time-delay?
It is fast-acting. Expect it to open quickly on overload.
Can the 0603HV1.25-R be used on a higher fault-current circuit?
No — its interrupting rating is 50 A at rated voltage. Choose a part whose breaking capacity exceeds the prospective fault current.
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