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Littelfuse 045406.3NR | 6.3 A 72 VAC / 75 VDC SMD Fuse
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pLittelfuse 045406.3NR — 6.3 A, 72 V, SMD fuse, 50 A @ 72 VAC; 50 A @ 60 VDC; 100 A @ 75 VDC interrupting./p
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Littelfuse 045406.3NR | 6.3 A 72 VAC / 75 VDC SMD Fuse
Built by Littelfuse, the 045406.3NR carries 6.3 A, rated 72 VAC / 75 VDC.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Littelfuse / 454 Series |
| Part number | 045406.3NR |
| Fuse characteristic | time-lag (Slo-Blo) |
| Rated current | 6.3 A |
| Voltage rating | 72 VAC / 75 VDC |
| Interrupting rating | 50 A @ 72 VAC; 50 A @ 60 VDC; 100 A @ 75 VDC |
| Nominal cold resistance | 0.0123 Ω |
| Nominal melting I²t | 64.0 A²s |
| Package | 2410 / 6125 NANO2 |
| 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 @ 72 VAC; 50 A @ 60 VDC; 100 A @ 75 VDC — confirm the circuit's prospective fault current stays below this.
- Working voltage must stay at or below 72 VAC / 75 VDC; a lower-rated part is not a safe substitute.
- Do not upsize beyond 6.3 A to stop nuisance trips — fix the cause instead.
Typical Applications
Engineers usually specify it for these duties:
- EV
- server
- surge
Part Number and Packing
Order code 045406.3NR from Littelfuse, supplied in 2410 / 6125 NANO2. Confirm the exact suffix before release.
Q&A
What are the ratings of the 045406.3NR?
6.3 A continuous at 72 VAC / 75 VDC, interrupting rating 50 A @ 72 VAC; 50 A @ 60 VDC; 100 A @ 75 VDC.
Can the 045406.3NR be used on a higher fault-current circuit?
No — its interrupting rating is 50 A @ 72 VAC; 50 A @ 60 VDC; 100 A @ 75 VDC. Choose a part whose breaking capacity exceeds the prospective fault current.
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