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Littelfuse 04581.25DR | 1.25 A 75 VDC / 48 VAC (32 VAC from 4 A) SMD Fuse
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pLittelfuse 04581.25DR — 1.25 A, 75 V, SMD fuse, 50 A at the applicable AC/DC rating interrupting./p
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Littelfuse 04581.25DR | 1.25 A 75 VDC / 48 VAC (32 VAC from 4 A) SMD Fuse
The 04581.25DR from Littelfuse carries 1.25 A, rated 75 VDC / 48 VAC (32 VAC from 4 A).
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Littelfuse / 458 Series |
| Part number | 04581.25DR |
| Fuse characteristic | inrush-withstand |
| Rated current | 1.25 A |
| Voltage rating | 75 VDC / 48 VAC (32 VAC from 4 A) |
| Interrupting rating | 50 A at the applicable AC/DC rating |
| Nominal cold resistance | 0.125 Ω |
| Nominal melting I²t | 0.313 A²s |
| Package | 1206 / 3216 NANO2 wire-in-air |
| Operating temperature | -55 °C to +125 °C |
| Agency / environmental | UL Recognized, RoHS compliant, halogen-free and lead-free assembly compatible |
Practical Notes
- Interrupting capability is 50 A at the applicable AC/DC rating — confirm the circuit's prospective fault current stays below this.
- Working voltage must stay at or below 75 VDC / 48 VAC (32 VAC from 4 A); a lower-rated part is not a safe substitute.
- Do not upsize beyond 1.25 A to stop nuisance trips — fix the cause instead.
Application Scenarios
Common installation contexts include:
- battery
- EV
- telecom
Buying Notes
Order code 04581.25DR from Littelfuse, supplied in 1206 / 3216 NANO2 wire-in-air. Confirm the exact suffix before release.
Questions and Answers
What are the ratings of the 04581.25DR?
1.25 A continuous at 75 VDC / 48 VAC (32 VAC from 4 A), interrupting rating 50 A at the applicable AC/DC rating.
Can the 04581.25DR be used on a higher fault-current circuit?
No — its interrupting rating is 50 A at the applicable AC/DC rating. Choose a part whose breaking capacity exceeds the prospective fault current.
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