Eaton / Cutler-HammerFAZ-B15/3-NA
Eaton / Cutler-Hammer FAZ-B4/3-NA Miniature Circuit Breaker
- 4A
- 3 Pole
- DIN Rail
Eaton / Cutler-Hammer
FAZ-B4/3-NA
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
FAZ-B4/3-NA
Quantity
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Eaton / Cutler-Hammer FAZ-B4/3-NA - 4A 3 Pole Miniature Circuit Breaker
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Description
Delivering reliable three-phase protection, this 4A miniature breaker safeguards industrial machinery. Its B-curve trip characteristic is tailored for highly resistive loads, ensuring rapid response to low-level short circuits. Designed for seamless integration, the unit mounts onto 35mm DIN rails inside automation panels. As a UL 489 listed component, it meets strict requirements for branch circuit applications. The trip-free mechanism guarantees contacts will open under fault conditions.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FAZ-B4/3-NA |
| Series | FAZ |
| Amperage | 4A |
| Poles | 3 |
| Mounting Style | DIN Rail |
| Voltage | 480Y/277VAC, 96VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 480Y/277VAC, 10kA @ 96VDC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | DIN Rail Systems, 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 | B |
| Trip Adjustability | Fixed |
| Available Options | Auxiliary Switch, Alarm Switch, Shunt Trip, Undervoltage Release, Padlock Attachment, Busbar System |
|---|---|
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | ABS, CE, CSA, cULus, DNV, IEC, Lloyd's, SWD, UL, VDE |
| Temp Rating | -25C to 75C |
| Construction Features | Current Limiting, HACR Rated, Reverse Feed, Common Trip, Trip-Free Mechanism, RoHS Compliant |
Product FAQs
7 answersWhat does the B-curve trip characteristic mean for the FAZ-B4/3-NA?
The B-curve magnetic trip point is set between 3 and 5 times the rated current. This makes it ideal for protecting highly resistive loads, control circuits, and applications where low levels of inrush current are expected, such as PLCs and sensitive control instrumentation.
Is the FAZ-B4/3-NA suitable for branch circuit protection?
Yes. The -NA suffix indicates this breaker is UL 489 listed for branch circuit protection, unlike standard FAZ breakers which are UL 1077 supplementary protectors. It can be used for feeder and branch circuits, motor control circuits, and HACR equipment.
Can the FAZ-B4/3-NA be reverse fed?
Yes, this breaker supports reverse feed configurations. The line and load connections can be wired to either the top or bottom terminals without affecting the protective functions of the device.
What are the recommended terminal tightening torques for this breaker?
The required torque depends on the wire size used. For 18 to 12 AWG wire, torque to 21 lb-in. For 10 to 8 AWG wire, torque to 25 lb-in. For 6 AWG wire, torque to 36 lb-in.
Are there field-installable accessories available for the FAZ-NA series?
Yes, the FAZ-NA series accepts snap-on accessories including auxiliary contacts, alarm switches, shunt trips, and undervoltage releases. These mount directly to the side of the breaker without requiring special tools.
Is the FAZ-B4/3-NA a current-limiting breaker?
Yes, it features a current-limiting design that interrupts fault currents within one-half cycle. This rapid response reduces the peak let-through energy, providing superior protection for downstream components.
Does this breaker have a trip-free mechanism?
Yes, the FAZ-B4/3-NA features a trip-free design. The breaker contacts will open under fault conditions even if the operating handle is physically held in the ON position.
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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.