Eaton NZMN2-AF125-NA Molded Case Circuit Breaker - 50 kAIC
Part Number: NZMN2-AF125-NA
Quick Summary
NZMN2-AF125-NA molded case circuit breaker by Eaton protects distribution circuits in industrial power systems, delivering reliable thermal-magnetic protection in a compact footprint. A common challenge is selecting devices that withstand high fault currents while fitting modern panels with limited mounting space. Typical requirements include CE compliance, IP-rated enclosures, and SIL considerations for safety-critical applications; verify with Eaton to confirm exact certifications. With a three-pole NZMN2 frame and front screw connections, this unit supports fast installation and straightforward maintenance, reducing downtime and field errors. In addition, it aligns with distribution protection strategies, enabling scalable protection across board level circuits and power distribution units.
Product Information
Extended Description
NZMN2-AF125-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMN2, Thermal-magnetic trip, 750-1250A delayed trip rating, Three-pole, 125A, 690 Vac, 750 Vdc, 50 kAIC, Distribution circuit protection, 125-125A, Front screw, 125-125A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMN2-AF125-NA
EAN
4015082691844
Product Length/Depth
5.866 in
Product Height
4.134 in
Product Width
4.134 in
Product Weight
5.302 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Compliances
Contact Manufacturer
Amperage Rating
125 A
Voltage rating
690 Vac, 750 Vdc
Trip Type
T268
Circuit breaker type
NZMN2
Frame
NZM2
Class
Distribution circuit protection
Accessories
Rocker lever, motor drive
Setting Range Ol Protector
125-125A
Short-circuit breaking capacity
50 kAIC
Interrupt rating
50 kAIC
Connection
Front screw
Overload range
125-125A
Number of poles
Three-pole
Trip rating
750-1250 A delayed
The NZMN2-AF125-NA uses a three-pole design within the NZM2 frame and 125 A rating to ensure coordinated protection across all phases, reducing the risk of asymmetric faults and downstream damage. This translates to predictable trip behavior and safer startup sequences in manufacturing lines and distribution panels. The thermal-magnetic T268 trip mechanism provides fast protection against short circuits while controlling overloads, which lowers arc flash exposure and equipment damage in high-demand systems. With a short-circuit breaking capacity of 50 kAIC, the breaker supports large motor feeders and critical loads, improving overall system reliability for conveyors, presses, and process lines. Front screw termination simplifies wiring in tight panel spaces and enhances field maintenance efficiency, while the Rocker lever and motor-drive accessories improve operability and commissioning speed. The NZMN2-AF125-NA is designed to be compatible with Eaton’s NZMN2 family, ensuring easy upgrades and standardized maintenance across panels, with Eaton’s one-year warranty and typical safety documentation as part of the value proposition. Compatibility with 690 Vac and 750 Vdc applications makes it suitable for mixed-supply environments, helping engineers consolidate protection strategies across equipment and assemblies.
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FAQs
NZMN2-AF125-NA is a three-pole device with a 125 A amperage rating, 690 Vac and 750 Vdc voltage ratings, and a 50 kAIC short-circuit capacity. It is typically used for distribution panel protection in industrial environments, including manufacturing, processing lines, and machine control panels where predictable fault isolation is critical.
The breaker uses front screw terminals for wiring, offering convenient top-entry or side-entry options in confined spaces. Its compact 5.866 inch depth and 4.134 inch width/height fit standard panel cutouts, while the three-pole configuration simplifies wiring consolidation. This design supports quick commissioning and easier field maintenance.
Yes. The NZMN2-AF125-NA includes accessories such as rocker lever and motor-drive compatibility, and it is part of the NZMN2 frame family. This enables integrated motor-protection solutions, streamlined installation, and consistent maintenance across multiple breakers within a panel.
The breaker uses a thermal-magnetic trip (T268) designed for fast response to short circuits and overloads. With a 50 kAIC short-circuit rating, it provides robust protection for large feeders and motor loads, reducing the risk of extensive equipment damage and unplanned downtime.
The official Eaton specification sheet is available at https://www.eaton.com/us/en-us/skuPage.NZMN2-AF125-NA.pdf. This document includes complete electrical ratings, mechanical dimensions, wiring details, and guidance on accessories and installation.