Eaton / Cutler-Hammer FAZ-B4/1-NA-SP Miniature Circuit Breaker
- 4A
- 1 Pole
- DIN Rail
Quantity
Eaton / Cutler-Hammer FAZ-B4/1-NA-SP - 4A 1 Pole Miniature Circuit Breaker
New
Quantity
Description
Engineered for commercial and industrial applications, this miniature device delivers reliable branch circuit protection. The B-curve trip mechanism is optimized for resistive loads with low inrush currents. Mounting onto standard 35mm DIN rail systems, it integrates seamlessly into control panels and replaces the FAZ-B4/1-NA. Carrying a UL 489 listing, this current-limiting unit ensures compliance. It features a visual status indicator and a trip-free mechanism for enhanced safety.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | FAZ |
| Amperage | 4A |
| Poles | 1 |
| Mounting Style | DIN Rail |
| Voltage | 277VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 277VAC, 10kA @ 48VDC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | DIN Rail Systems, Industrial Control Panels |
| Wire Gauge | 18-6 AWG |
| 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, Busbar System, Lockout Attachment, Shunt Trip, Undervoltage Release |
|---|---|
| Standards | CSA C22.2 No. 5, IEC 60947-2, RoHS, UL 489 |
| Approval | ABS, CCC, CE, CSA, DNV, GL, IEC, Lloyd's, UL, VDE |
| Temp Rating | -25C to 75C |
| Construction Features | Current Limiting, HACR Rated, Reverse Feed, SWD Rated, Trip-Free Mechanism |
Product FAQs
7 answersWhat is the difference between the Eaton FAZ-B4/1-NA and FAZ-B4/1-NA-SP?
The "SP" suffix simply indicates that the breaker is packaged as a single unit (Single Pack). Both catalog numbers refer to the exact same 4A, 1-pole, B-curve miniature circuit breaker.
What applications are best suited for the B-curve trip characteristic?
The B-curve profile is engineered to trip instantaneously at 3 to 5 times the rated current. It is optimized for resistive loads or circuits where low levels of inrush current are expected, such as PLCs, control circuits, and basic lighting.
What does the "NA" suffix indicate on this Eaton FAZ breaker?
The "NA" designates North American approval. It indicates that the breaker is UL 489 listed for branch circuit protection, which allows it to be used as a primary overcurrent device rather than just a supplementary protector.
What type of DIN rail is required to mount the FAZ-B4/1-NA-SP?
This miniature circuit breaker is designed to snap directly onto any standard 35mm DIN rail. No additional mounting hardware or adapters are required for installation inside control panels.
Is the FAZ-B4/1-NA-SP suitable for DC control circuits?
Yes, while primarily used for 277VAC applications, this breaker is also fully rated for 48VDC systems with a 10kA interrupting capacity, making it highly versatile for industrial automation panels.
What is the acceptable wire size range for the box lug terminals on the FAZ-B4/1-NA-SP?
The screw-type box lugs are designed to securely terminate stranded or solid copper conductors ranging from 18 AWG up to 6 AWG.
Does the FAZ-B4/1-NA-SP feature a trip-free mechanism?
Yes, this breaker includes a trip-free mechanism. This safety feature ensures the internal contacts will open during a fault condition even if the toggle handle is physically held or locked in the ON position.
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Reviews
Review summary
Customers rate this product 2.0 out of 5 based on 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.