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Littelfuse 0443003.DR | 3 A 250 VAC SMD Fuse
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pLittelfuse 0443003.DR — 3 A, 250 V, SMD fuse, 50 A @ 250 VAC; 100 A @ 125 VDC; 500 A @ 60 VDC interrupting./p
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Littelfuse 0443003.DR | 3 A 250 VAC SMD Fuse
Built by Littelfuse, the 0443003.DR carries 3 A, rated 250 VAC.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Littelfuse / 443 Series |
| Part number | 0443003.DR |
| Fuse characteristic | time-lag (Slo-Blo) |
| Rated current | 3 A |
| Voltage rating | 250 VAC |
| Interrupting rating | 50 A @ 250 VAC; 100 A @ 125 VDC; 500 A @ 60 VDC |
| Nominal cold resistance | 0.028 Ω |
| Nominal melting I²t | 51.44 A²s |
| Package | NANO2 high-voltage SMD (approx. 10.1 × 3.1 mm) |
| Operating temperature | -55 °C to +125 °C |
| Agency / environmental | UL Recognized, CSA Certified, IEC/EN 60127 compliant, RoHS compliant and halogen-free |
Selection Notes
- Interrupting capability is 50 A @ 250 VAC; 100 A @ 125 VDC; 500 A @ 60 VDC — confirm the circuit's prospective fault current stays below this.
- Working voltage must stay at or below 250 VAC; a lower-rated part is not a safe substitute.
- Do not upsize beyond 3 A to stop nuisance trips — fix the cause instead.
Typical Applications
Engineers usually specify it for these duties:
- EV
- telecom
- adapter
- lighting
Part Number and Packing
Order code 0443003.DR from Littelfuse, supplied in NANO2 high-voltage SMD (approx. 10.1 × 3.1 mm). Confirm the exact suffix before release.
Q&A
What are the ratings of the 0443003.DR?
3 A continuous at 250 VAC, interrupting rating 50 A @ 250 VAC; 100 A @ 125 VDC; 500 A @ 60 VDC.
Can the 0443003.DR be used on a higher fault-current circuit?
No — its interrupting rating is 50 A @ 250 VAC; 100 A @ 125 VDC; 500 A @ 60 VDC. Choose a part whose breaking capacity exceeds the prospective fault current.
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