Eaton / Cutler-Hammer FAZ-B16/3-NA Miniature Circuit Breaker
- 16A
- 3 Pole
- DIN Rail
Quantity
Eaton / Cutler-Hammer FAZ-B16/3-NA - 16A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Rated for 480Y/277VAC systems, this three-pole 16A miniature breaker supplies essential current-limiting capabilities for industrial facilities. It fastens onto standard DIN rails and serves as an exact cross-reference for discontinued WMZT3B16 models. Utilizing a B-curve thermal-magnetic mechanism, the device trips rapidly under fault conditions to shield sensitive control wiring. It features a trip-free design and holds UL 489 certification for rigorous branch circuit applications.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FAZ-B16/3-NA |
| Series | FAZ-NA |
| Amperage | 16A |
| Poles | 3 |
| Mounting Style | DIN Rail |
| Voltage | 480Y/277VAC, 96VDC |
| Phase | 3 |
| AIC Rating | 14kA @ 480Y/277VAC, 10kA @ 96VDC |
| Frame Type | FAZ |
|---|---|
| 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, Shunt Trip, Undervoltage Release, Busbar System, Lockout Attachment |
|---|---|
| Accessories | Auxiliary Switch, Busbar System, Lockout Attachment, Shunt Trip, Undervoltage Release |
| 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, Trip-Free Mechanism |
Product FAQs
10 answersWhat does the B-curve trip characteristic mean for the FAZ-B16/3-NA?
The B-curve provides an instantaneous magnetic trip point between 3 and 5 times the 16A rated current. It is designed for resistive or slightly inductive loads where low levels of inrush current are expected, protecting against potential wiring damage at low fault conditions.
Is the FAZ-B16/3-NA rated as a branch circuit breaker or a supplementary protector?
The FAZ-NA series is UL 489 listed for branch circuit protection. It can also be used in applications where UL 1077 supplementary protectors are allowed, but UL 1077 devices cannot be used in place of this UL 489 breaker.
How does the current-limiting design of the FAZ-B16/3-NA benefit control panels?
As a current-limiting breaker, it interrupts fault currents within one-half cycle. This fast short-circuit interruption reduces the peak let-through energy, offering superior protection for sensitive downstream components in industrial control panels.
Can I use the FAZ-B16/3-NA to switch fluorescent lighting loads?
Yes, Eaton FAZ-NA miniature circuit breakers rated 20A and under are SWD (switching duty) rated, making this 16A breaker suitable for switching fluorescent lighting loads.
Can this breaker be reverse fed in a control panel?
Yes, power to the FAZ-B16/3-NA can be fed from either the line or the load side, allowing for reverse feed configurations in your DIN rail system.
What wiring configurations are supported by the box lug terminals on this breaker?
The standard box terminals feature captive screws that cannot be lost during installation. They accept a single wire from 18 to 6 AWG, or two wires from 18 to 10 AWG, providing flexibility for control panel wiring.
How much DIN rail space does this 3-pole breaker require?
The FAZ-NA series has a module width of approximately 17.5 mm per pole. As a 3-pole breaker, it will occupy roughly 52.5 mm of space on a standard 35 mm DIN rail.
What legacy Cutler-Hammer part does the FAZ-B16/3-NA replace?
This breaker is the direct replacement for the legacy Cutler-Hammer WMZT3B16 miniature circuit breaker.
Does the FAZ-B16/3-NA have a trip-free mechanism?
Yes, it features a trip-free design. The breaker will still trip during an overcurrent or short-circuit event even if the toggle handle is physically held in the ON position.
How can I visually verify the isolation status of this breaker?
The breaker includes a color-coded indicator that provides immediate visual confirmation of the device status and isolation function. It displays green for OFF and red for ON.
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