Eaton / Cutler-HammerFAZ-D10/3-NA
Eaton / Cutler-Hammer FAZ-D8/3-NA Miniature Circuit Breaker
- 8A
- 3 Pole
- DIN Rail
Eaton / Cutler-Hammer
FAZ-D8/3-NA
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
FAZ-D8/3-NA
Quantity
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Eaton / Cutler-Hammer FAZ-D8/3-NA - 8A 3 Pole Miniature Circuit Breaker
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Description
Rated for 480Y/277VAC applications, this three-pole 8A miniature breaker delivers essential protection for heavy-duty marine and industrial equipment. It installs easily into standard DIN rail systems and serves as an exact replacement for the discontinued WMZT3D08 model. The integrated D-curve thermal-magnetic trip mechanism allows for high starting currents typical of industrial motors, ensuring continuous operation while maintaining strict UL 489 safety standards.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FAZ-D8/3-NA |
| Series | FAZ-NA |
| Amperage | 8A |
| 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, 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 | D |
| Trip Adjustability | Fixed |
| Available Options | Auxiliary Switch, Busbar System, Lockout Attachment, Shunt Trip, Undervoltage Release |
|---|---|
| Accessories | None included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | ABS, CE, CSA, cULus, DNV, IEC, Lloyd's, UL, VDE |
| Temp Rating | -25C to 75C |
Product FAQs
10 answersWhat does the D trip curve indicate for this breaker?
The D curve features a magnetic trip point of 10 to 20 times the rated current. This prevents nuisance tripping in highly inductive applications with significant startup inrush currents, such as motors, transformers, and power supplies.
What is the difference between the NA suffix and other FAZ breakers?
The NA suffix indicates that the breaker is UL 489 listed for branch circuit protection in North America. It can also be used in applications where UL 1077 supplementary protectors are permitted.
Is this breaker considered current limiting?
Yes, FAZ-NA devices are current limiting. They are designed to interrupt fault currents within one half cycle, reducing peak let-through energy to protect downstream equipment.
Can the FAZ-D8/3-NA be reverse fed?
Yes, Eaton FAZ-NA miniature circuit breakers are suitable for reverse feed applications. Power can be supplied to either the line or load side terminals.
What are the terminal torque specifications for this breaker?
The required tightening torque depends on the wire size. Use 21 lb-in for 18 to 12 AWG, 25 lb-in for 10 to 8 AWG, and 36 lb-in for 6 AWG conductors.
Does Eaton recommend using wire ferrules with these terminals?
No, Eaton does not recommend the use of wire ferrules or crimping terminals for the FAZ-NA series box lugs. Bare wire connections are specified.
How much DIN rail space does this 3-pole breaker require?
The breaker requires approximately 53 millimeters of space on a standard 35 millimeter DIN rail, as each pole has a module width of 17.7 millimeters.
Does this breaker feature a trip-free mechanism?
Yes, it utilizes a trip-free design. The breaker will trip internally during an overcurrent or short circuit event even if the handle is physically held in the ON position.
How can I verify the contact position of the breaker?
The front of the breaker includes a color-coded indicator that provides immediate visual confirmation of the device status. It displays red when the contacts are closed and green when the contacts are open.
Can I use this UL 489 breaker to replace a UL 1077 supplementary protector?
Yes, UL 489 listed branch circuit breakers can be used in place of UL 1077 supplementary protectors. However, UL 1077 devices cannot be used to replace UL 489 breakers.
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