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Eaton CB61F40A 40 A 63 Vdc Fast-Acting Brick Fuse
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pEaton CB61F40A — 40 A, 63 V, fast-acting fuse, not rated for AC interrupting./p
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Eaton CB61F40A 40 A 63 Vdc Fast-Acting Brick Fuse
Eaton CB61F40A 40 A 63 Vdc Fast-Acting Brick Fuse belongs to the Eaton range. It carries 40 A, rated no AC rating, uses a fast-acting element.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Eaton / CB61F Series |
| Orderable part number | CB61F40A (add -TR1 or -TR2 packaging suffix) |
| Current rating | 40 A |
| Voltage rating (AC) | no AC rating |
| Voltage rating (DC) | 63 Vdc |
| Interrupting rating (AC) | not rated for AC |
| Interrupting rating (DC) | 500 A @ 63 Vdc |
| Typical DC cold resistance | 0.9 mOhm |
| Typical melting I2t | 1600 A2s |
| Typical voltage drop | 50 mV |
| Part marking | 40 |
| Package | 2410 (6125 metric) surface mount brick, wire-in-air element |
| Moisture sensitivity level | MSL 1 |
| Agency / environmental | UL Listed cULus file E19180 guide JDYX (2-15 A); UL Recognized cURus file E19180 guide JDYX2 (20-40 A); CQC CQC09012040316 (2-6.3 A and 8-10 A); designed to UL 248; RoHS compliant and halogen free |
Design Notes
- Interrupting capability is not rated for AC — 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 no AC rating; a lower-rated part is not a safe substitute.
- Do not upsize beyond 40 A to stop nuisance trips — fix the cause instead.
Where It Is Used
Typical places this fuse turns up:
- EV
Ordering Details
Order code CB61F40A from Eaton, supplied in 2410 (6125 metric) surface mount brick, wire-in-air element. Confirm the exact suffix before release.
Common Questions
What are the ratings of the CB61F40A?
40 A continuous at no AC rating, interrupting rating not rated for AC.
Is the CB61F40A fast-acting or time-delay?
It is fast-acting. Expect it to open quickly on overload.
Can the CB61F40A be used on a higher fault-current circuit?
No — its interrupting rating is not rated for AC. Choose a part whose breaking capacity exceeds the prospective fault current.
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