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Littelfuse 049402.5NRHF | 2.5A 0603 fast-acting ceramic chip fuse
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pLittelfuse 049402.5NRHF — 2.5 A, 32 V, fast-acting SMD fuse, 35 A @ 32 V AC/DC interrupting./p
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Littelfuse 049402.5NRHF | 2.5A 0603 fast-acting ceramic chip fuse
The 049402.5NRHF from Littelfuse carries 2.5 A, rated 32 V, uses a fast-acting element, in a ceramic body.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Littelfuse / 494 Series |
| Part number | 049402.5NRHF |
| Fuse characteristic | Fast-acting thin-film surface-mount fuse |
| Rated current | 2.5 A |
| Maximum voltage rating | 32 V |
| Interrupting capability | 35 A @ 32 V AC/DC |
| Package | 0603 (approx. 1.6 × 0.8 mm) |
| Body / construction | Advanced high-temperature substrate |
| Operating temperature | -55 °C to +90 °C |
| Environmental / approvals | Lead-free and RoHS compliant; NRHF denotes the halogen-free option. NRA denotes the special NRA ordering variant. |
| Product status | Verify current orderability |
Practical Notes
- Interrupting capability is 35 A @ 32 V AC/DC — 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 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.
Application Scenarios
Common installation contexts include:
- EV
Buying Notes
Order code 049402.5NRHF from Littelfuse, supplied in 0603 (approx. 1.6 × 0.8 mm). Confirm the exact suffix before release.
Questions and Answers
What are the ratings of the 049402.5NRHF?
2.5 A continuous at 32 V, interrupting rating 35 A @ 32 V AC/DC.
Is the 049402.5NRHF fast-acting or time-delay?
It is fast-acting. Expect it to open quickly on overload.
Can the 049402.5NRHF be used on a higher fault-current circuit?
No — its interrupting rating is 35 A @ 32 V AC/DC. Choose a part whose breaking capacity exceeds the prospective fault current.
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