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Eaton AHCA-BM-PCBHT 40 A 450 Vac Automotive High Voltage Fast-Acting Fuse
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pEaton AHCA-BM-PCBHT — 40 A, 450 V, fast-acting fuse, 10,000 A @ 450 Vac interrupting./p
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Eaton AHCA-BM-PCBHT 40 A 450 Vac Automotive High Voltage Fast-Acting Fuse
Built by Eaton, the AHCA-BM-PCBHT carries 40 A, rated 450 Vac, uses a fast-acting element.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Eaton / AHCA-BM Series |
| Part number | AHCA-BM-PCBHT |
| Current rating | 40 A |
| Voltage rating | 450 Vac |
| Interrupting rating | 10,000 A @ 450 Vac |
| Nominal cold resistance | 2.9 mΩ (0.0029 Ω) |
| Package | 1/4 x 1-1/4 in (6.3 x 32 mm) ceramic tube, PCB terminal mount |
| Terminal | copper terminals with bright nickel plating, high temperature |
| Operating temperature | -55 °C to +85 °C with derating applied |
| Agency / environmental | Eaton internal AEC-Q200 test plan; MIL-STD-202G method 211A terminal strength; RoHS compliant and halogen free |
Selection Notes
- Interrupting capability is 10,000 A @ 450 Vac — 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 450 Vac; a lower-rated part is not a safe substitute.
- Do not upsize beyond 40 A to stop nuisance trips — fix the cause instead.
Typical Applications
Engineers usually specify it for these duties:
- EV
- automotive
- transformer
Part Number and Packing
Order code AHCA-BM-PCBHT from Eaton, supplied in 1/4 x 1-1/4 in (6.3 x 32 mm) ceramic tube, PCB terminal mount. Confirm the exact suffix before release.
Q&A
What are the ratings of the AHCA-BM-PCBHT?
40 A continuous at 450 Vac, interrupting rating 10,000 A @ 450 Vac.
Is the AHCA-BM-PCBHT fast-acting or time-delay?
It is fast-acting. Expect it to open quickly on overload.
Can the AHCA-BM-PCBHT be used on a higher fault-current circuit?
No — its interrupting rating is 10,000 A @ 450 Vac. Choose a part whose breaking capacity exceeds the prospective fault current.
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