Eaton / Cutler-Hammer FAZ-D40/3-NA Miniature Circuit Breaker
- 40A
- 3 Pole
- DIN Rail
Eaton / Cutler-Hammer
FAZ-D40/3-NA
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
FAZ-D40/3-NA
Quantity
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Eaton / Cutler-Hammer FAZ-D40/3-NA - 40A 3 Pole Miniature Circuit Breaker
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Description
Offering premium protection for three-phase systems, this 40A miniature circuit breaker is optimized for highly inductive loads. The D-curve magnetic trip responds at 10 to 20 times the rated current, preventing nuisance trips during the high inrush phases of motor and transformer startups. The unit fastens securely to 35mm DIN rail networks within industrial control panels. It features finger-safe box lug terminals for secure wiring. This UL 489 listed breaker delivers 14 kAIC at 240VAC.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | FAZ |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | DIN Rail |
| Voltage | 240VAC, 480Y/277VAC, 96VDC |
| Phase | 3 |
| AIC Rating | 14kA @ 240VAC, 10kA @ 480Y/277VAC, 10kA @ 96VDC |
| Frame Type | FAZ |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | DIN Rail Panels, Industrial Control Panels |
| Wire Gauge | 18-6 AWG (1 wire), 18-10 AWG (2 wires) |
| Max Wire | 6 AWG |
| Min Wire | 18 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Curve | D |
| Trip Adjustability | Fixed |
| Available Options | Auxiliary Switch, Shunt Trip, Undervoltage Release, Lockout Attachment, Busbar System |
|---|---|
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | ABS, CE, CSA, IEC, RoHS, UL, VDE |
| Temp Rating | -25C to 75C |
| Construction Features | Current Limiting, HACR Rated, Reverse Feed, Visual Trip Indicator, Trip-Free Mechanism, Finger-Safe Terminals |
Product FAQs
7 answersWhat applications are suitable for the D-curve trip characteristic on this breaker?
The D-curve trip profile allows for high inrush currents of 10 to 20 times the rated current. This makes it ideal for highly inductive loads such as motors, transformers, and certain power supplies where high startup surges are expected without causing nuisance tripping.
Is the FAZ-D40/3-NA rated for branch circuit protection?
Yes. The -NA suffix indicates this miniature circuit breaker is UL 489 listed for branch circuit protection in North America. This differs from standard FAZ breakers, which are typically UL 1077 recognized for supplementary protection only.
What type of DIN rail is required to mount the FAZ-D40/3-NA?
This miniature circuit breaker is designed to snap directly onto a standard 35mm DIN rail for quick installation in control panels.
What wire sizes are accepted by the box lugs on this 40A breaker?
The terminals accept 18 to 6 AWG when terminating a single wire, or 18 to 10 AWG when connecting two wires into the same lug.
Does this Eaton FAZ breaker feature a trip-free mechanism?
Yes, it utilizes a trip-free design. The breaker will trip internally under overcurrent or short-circuit conditions even if the operating handle is physically held or locked in the ON position.
How can I visually verify the contact status of the FAZ-D40/3-NA?
The breaker includes a built-in red and green contact position indicator on the front face, allowing you to quickly confirm whether the internal contacts are open or closed.
Can I add auxiliary contacts or shunt trips to this FAZ-NA breaker?
Yes, the FAZ-NA series supports field-installable accessories. Auxiliary switches, alarm contacts, and shunt trips can be mounted to the side of the breaker to integrate with your control system.
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Reviews
Review summary
Customers rate this product 2.0 out of 5 based on 2 reviews.
Total 5 star reviews: 0 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 2 Total 1 star reviews: 0
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Rating
2 reviews
- VVictorVerified ReviewerReviewingEaton / Cutler-Hammer FAZ-C50/3 - 50A 3 Pole Supplementary ProtectorI do not recommend this productRated 2 out of 5 stars1/12/26NO DIMENSIONS!
Once again not one single dimension listed. Once again I can't consider buying because you provided NO PHYSICAL DIMENSIONS
- VGVictor G.Verified ReviewerReviewingEaton / Cutler-Hammer FAZ-C50/3 - 50A 3 Pole Supplementary ProtectorI do not recommend this productRated 2 out of 5 stars1/12/26NO PHYSICAL DIMENSIONS
Where are the physical dimensions? Can't buy it without them.