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Littelfuse 0456020.ER | 20 A 65 VDC / 125 VAC SMD Fuse
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pLittelfuse 0456020.ER — 20 A, 65 V, SMD fuse, 100 A @ 125 VAC; 300 A @ 65 VDC interrupting./p
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Littelfuse 0456020.ER | 20 A 65 VDC / 125 VAC SMD Fuse
Built by Littelfuse, the 0456020.ER carries 20 A, rated 65 VDC / 125 VAC.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Littelfuse / 456 Series |
| Part number | 0456020.ER |
| Fuse characteristic | very fast-acting |
| Rated current | 20 A |
| Voltage rating | 65 VDC / 125 VAC |
| Interrupting rating | 100 A @ 125 VAC; 300 A @ 65 VDC |
| Nominal cold resistance | 0.0023 Ω |
| Nominal melting I²t | 18 A²s |
| Package | 4012 NANO2 high-current SMD |
| Operating temperature | -55 °C to +125 °C |
| Agency / environmental | UL Recognized, RoHS compliant and lead-free |
Selection Notes
- Interrupting capability is 100 A @ 125 VAC; 300 A @ 65 VDC — confirm the circuit's prospective fault current stays below this.
- Working voltage must stay at or below 65 VDC / 125 VAC; a lower-rated part is not a safe substitute.
- Do not upsize beyond 20 A to stop nuisance trips — fix the cause instead.
Typical Applications
Engineers usually specify it for these duties:
- battery
- EV
- telecom
- server
Part Number and Packing
Order code 0456020.ER from Littelfuse, supplied in 4012 NANO2 high-current SMD. Confirm the exact suffix before release.
Q&A
What are the ratings of the 0456020.ER?
20 A continuous at 65 VDC / 125 VAC, interrupting rating 100 A @ 125 VAC; 300 A @ 65 VDC.
Can the 0456020.ER be used on a higher fault-current circuit?
No — its interrupting rating is 100 A @ 125 VAC; 300 A @ 65 VDC. Choose a part whose breaking capacity exceeds the prospective fault current.
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