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Littelfuse 0456030.ER 30 A 456 very fast-acting SMD Fuse
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pLittelfuse 0456030.ER — 30 A, 65 V, fast-acting SMD fuse, 100 A @ 125 VAC; 300 A @ 65 VDC interrupting./p
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Littelfuse 0456030.ER 30 A 456 very fast-acting SMD Fuse
Littelfuse 0456030.ER 30 A 456 very fast-acting SMD Fuse belongs to the Littelfuse range. It carries 30 A, rated 65 VDC / 125 VAC, uses a fast-acting element.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Littelfuse / 456 Series |
| Part number | 0456030.ER |
| Fuse characteristic | very fast-acting |
| Rated current | 30 A |
| Voltage rating | 65 VDC / 125 VAC |
| Interrupting rating | 100 A @ 125 VAC; 300 A @ 65 VDC |
| Nominal cold resistance | 0.00132 Ω |
| Nominal melting I²t | 81 A²s |
| Package | 4012 NANO2 high-current SMD |
| Operating temperature | -55 °C to +125 °C |
| Agency / environmental | UL Recognized, RoHS compliant and lead-free |
Design Notes
- Interrupting capability is 100 A @ 125 VAC; 300 A @ 65 VDC — 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 65 VDC / 125 VAC; a lower-rated part is not a safe substitute.
- Do not upsize beyond 30 A to stop nuisance trips — fix the cause instead.
Where It Is Used
Typical places this fuse turns up:
- battery
- EV
- telecom
- server
Ordering Details
Order code 0456030.ER from Littelfuse, supplied in 4012 NANO2 high-current SMD. Confirm the exact suffix before release.
Common Questions
What are the ratings of the 0456030.ER?
30 A continuous at 65 VDC / 125 VAC, interrupting rating 100 A @ 125 VAC; 300 A @ 65 VDC.
Is the 0456030.ER fast-acting or time-delay?
It is fast-acting. Expect it to open quickly on overload.
Can the 0456030.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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