Littelfuse 043502.5KRHF | 2.5A 0402 very fast-acting surface-mount fuse
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Littelfuse 043502.5KRHF | 2.5A 0402 very fast-acting surface-mount fuse
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Littelfuse / 435 Series |
| Part number | 043502.5KRHF |
| Fuse characteristic | Fast-acting thin-film / very fast protection profile |
| Rated current | 2.5 A |
| Maximum voltage rating | 32 V |
| Interrupting capability | 35 A @ 32 V AC/DC (additional DC capability is listed by Littelfuse for these ratings) |
| Package | 0402 (approx. 1.0 × 0.5 mm) |
| Body / construction | Epoxy / glass substrate |
| Operating temperature | -55 °C to +90 °C |
| Environmental / approvals | Lead-free and RoHS compliant; HF suffix identifies the halogen-free version. |
| Product status | Active / verify current orderability |
Selection Notes
- Interrupting capability is 35 A @ 32 V AC/DC (additional DC capability is listed by Littelfuse for these ratings) — 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 32 V; a lower-rated part is not a safe substitute.
- Do not upsize beyond 2.5 A to stop nuisance trips — fix the cause instead.
Typical Applications
Engineers usually specify it for these duties:
- EV
Part Number and Packing
Order code 043502.5KRHF from Littelfuse, supplied in 0402 (approx. 1.0 × 0.5 mm). Confirm the exact suffix before release.
Q&A
What are the ratings of the 043502.5KRHF?
2.5 A continuous at 32 V, interrupting rating 35 A @ 32 V AC/DC (additional DC capability is listed by Littelfuse for these ratings).
Is the 043502.5KRHF fast-acting or time-delay?
It is fast-acting. Expect it to open quickly on overload.
Can the 043502.5KRHF be used on a higher fault-current circuit?
No — its interrupting rating is 35 A @ 32 V AC/DC (additional DC capability is listed by Littelfuse for these ratings). Choose a part whose breaking capacity exceeds the prospective fault current.
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