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Littelfuse 0437008.WR 8A 1206 Very Fast Ceramic Chip Fuse
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pLittelfuse 0437008.WR — 8 A, 35 V, SMD fuse, 50 A; up to 32 VAC / 35 VDC interrupting./p
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Littelfuse 0437008.WR 8A 1206 Very Fast Ceramic Chip Fuse
Built by Littelfuse, the 0437008.WR carries 8 A, rated 35 V, uses a fast-acting element, in a ceramic body.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Littelfuse / 437 Series |
| Part number | 0437008.WR |
| Fuse characteristic | Fast-acting ceramic fuse |
| Rated current | 8 A |
| Maximum voltage rating | 35 V |
| Interrupting capability | 50 A; up to 32 VAC / 35 VDC |
| Package | 1206 (approx. 3.2 × 1.6 mm) |
| Body / construction | Advanced ceramic |
| Operating temperature | -55 °C to +150 °C |
| Environmental / approvals | 100% lead-free, halogen-free and RoHS compliant; UL/CSA recognition is listed across the series. |
| Product status | Active / verify current orderability |
Selection Notes
- Interrupting capability is 50 A; up to 32 VAC / 35 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.
- Ceramic body holds higher breaking capacity than glass at the same footprint.
- It is the usual choice where prospective fault current is high.
- Working voltage must stay at or below 35 V; a lower-rated part is not a safe substitute.
- Do not upsize beyond 8 A to stop nuisance trips — fix the cause instead.
Typical Applications
Engineers usually specify it for these duties:
- EV
- server
Part Number and Packing
Order code 0437008.WR from Littelfuse, supplied in 1206 (approx. 3.2 × 1.6 mm). Confirm the exact suffix before release.
Q&A
What are the ratings of the 0437008.WR?
8 A continuous at 35 V, interrupting rating 50 A; up to 32 VAC / 35 VDC.
Is the 0437008.WR fast-acting or time-delay?
It is fast-acting. Expect it to open quickly on overload.
Can the 0437008.WR be used on a higher fault-current circuit?
No — its interrupting rating is 50 A; up to 32 VAC / 35 VDC. Choose a part whose breaking capacity exceeds the prospective fault current.
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