Eaton / Cutler-Hammer FAZ-B4/2-NA Miniature Circuit Breaker
- 4A
- 2 Pole
- DIN Rail
Quantity
Eaton / Cutler-Hammer FAZ-B4/2-NA - 4A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Built to handle multi-phase commercial loads, this two-pole miniature breaker offers robust branch circuit protection. The B-curve profile is calibrated for resistive applications, tripping rapidly during low-level faults. It fastens onto standard DIN rail networks, making it ideal for high-density industrial control panels. Fully UL 489 listed, this current-limiting device provides reliable fault clearing. A built-in visual indicator allows personnel to quickly identify tripped circuits.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FAZ-B4/2-NA |
| Series | FAZ |
| Amperage | 4A |
| Poles | 2 |
| Mounting Style | DIN Rail |
| Voltage | 480Y/277VAC, 96VDC |
| Phase | 1 |
| 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, DNV, IEC, Lloyd's, RoHS, UL, VDE |
| Temp Rating | -40C to 75C |
| Construction Features | Current Limiting, HACR Rated, Reverse Feed, Common Trip, Trip-Free Mechanism, RoHS Compliant |
Product FAQs
6 answersWhat is the magnetic trip threshold for the B curve on this 4A breaker?
The B curve magnetic trip point is calibrated to trip between 3 and 5 times the 4A rated current. This tight tolerance is designed for resistive loads, PLCs, and sensitive electronic equipment with very low inrush currents.
What does the -NA suffix indicate on this Eaton FAZ breaker?
The -NA suffix designates that this breaker is UL 489 listed for primary branch circuit protection in North America. Standard FAZ breakers without this suffix are typically UL 1077 recognized as supplementary protectors only.
What wire gauges are compatible with the box lugs on the FAZ-B4/2-NA?
The feed-thru box lugs accept 18 to 6 AWG when terminating a single wire, or 18 to 10 AWG when landing two wires in the same terminal.
Does this Eaton FAZ breaker provide current-limiting protection?
Yes, it utilizes a current-limiting design that clears short circuits within one half-cycle. This rapid interruption reduces peak let-through energy, minimizing potential damage to downstream control panel components.
Can the FAZ-B4/2-NA be applied in DC control circuits?
Yes, it is dual-rated for both AC and DC systems. It provides a 10kA interrupting capacity at 96VDC, making it suitable for industrial DC control panels and automation equipment.
Can the handle on this breaker be held in the ON position to bypass a trip?
No, the FAZ-NA series features a trip-free mechanism. The breaker will still trip internally under fault conditions even if the toggle 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.
- 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.