Eaton NZMN1-A125-NA Molded Case Circuit Breaker - 50 kAIC
Part Number: NZMN1-A125-NA
Quick Summary
The Eaton NZMN1-A125-NA molded case circuit breaker protects distribution circuits in industrial panels. Engineers regularly face nuisance trips, limited installation flexibility, and wiring complexity in demanding 690 VAC environments, making reliable protective devices essential. Industry-standard references often consider CE, UL, and IP ratings when selecting equipment; verify the exact certifications for this model with Eaton. With a 125 A rating and a 50 kAIC short-circuit capacity, this unit supports robust protection across power distributions while streamlining panel design, standardization, and maintenance planning. The result is safer operation, reduced downtime, and a clearer path to regulatory compliance in modern automation environments.
Product Information
Extended Description
NZMN1-A125-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM1-frame, NZMN1, Thermal-magnetic trip, 750-1250A delayed, Three-pole, 125A, 690 Vac, 500 Vdc, 50 kAIC, Distribution circuit protection, 100-125A, Front frame clamp, 100-125A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMN1-A125-NA
EAN
4015082815738
Product Length/Depth
8 in
Product Height
4 in
Product Width
3.75 in
Product Weight
2.5 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, 500 Vdc
Trip Type
T268
Circuit breaker type
NZMN1
Frame
NZM1
Class
Distribution circuit protection
Accessories
Rocker lever
Setting Range Ol Protector
100-125A
Short-circuit breaking capacity
50 kAIC
Interrupt rating
50 kAIC
Connection
Front frame clamp
Overload range
100-125A
Number of poles
Three-pole
Trip rating
750-1250 A delayed
Feature → Business Impact → Application: Thermal-magnetic protection with a T268 trip type and 125 A setting ensures fast, selective fault isolation, minimizing process interruptions and extending equipment life in mission-critical lines. In practice, users see lower unplanned downtime and clearer fault diagnostics in automated production cells and power distribution panels. Application areas include industrial control cabinets and motor control centers where reliable protection is essential. Feature → Business Impact → Application: NZMN1 frame with 3 poles and a front frame clamp enables straightforward mounting and quick field servicing, reducing commissioning time and enabling rapid panel upgrades in space-constrained enclosures. This suits retrofit projects and new panel builds in automated lines that require clean, front-access wiring. Feature → Business Impact → Application: 50 kAIC interrupt capacity provides headroom for high fault currents typical of large drive systems and feeders, improving safety margins and reducing damage to upstream equipment. Use this in high-load motor feeders and distribution circuits where fault currents risk is elevated. Feature → Business Impact → Application: Compact dimensions (8 in L, 4 in H, 3.75 in W) and light weight (2.5 lb) simplify enclosure design, improve heat management, and save cabinet space, delivering cost-effective installation in compact automation panels. This is ideal for OEM panels and compact machine builds where space is at a premium. Feature → Business Impact → Application: Rocker lever accessory supports ergonomic operation and quick status checks, contributing to faster maintenance cycles and clearer operator feedback in busy manufacturing lines. This reduces routine service time and improves operator confidence. Feature → Business Impact → Application: Eaton warranty and support policy (one year from installation or 18 months from shipment) provides predictable maintenance windows and risk reduction for OEMs and end users, supporting total cost of ownership improvements in capital equipment budgets.
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FAQs
Installation begins by locating the NZMN1-A125-NA on a compatible panel rail or mounting surface using the front-frame clamp to secure the device. Verify alignment with the 3-pole assembly, connect conductors to the front terminals, and ensure proper torque on all connections. The 100-125 A setting range should be configured per system protection requirements. This approach simplifies serviceability and minimizes enclosure wiring complexity.
Key specs include an Amperage Rating of 125 A, Voltage Rating of 690 VAC and 500 VDC, Short-Circuit/Interrupt Rating of 50 kAIC, and a Trip Type of T268 with a setting range of 100-125 A. The device is a three-pole NZMN1 frame with front-frame clamp connections, designed for distribution protection in industrial panels.
Yes. The three-pole configuration within the NZM1 frame, combined with 690 VAC operation and a 50 kAIC short-circuit rating, makes it well-suited for 3-phase distribution and motor control centers. The thermal-magnetic trip provides reliable protection against overloads and short circuits in typical automation loads, improving uptime and safety.
Compliances are specified as Contact Manufacturer for this model, so verify the exact certifications with Eaton prior to procurement. In practice, confirm whether CE, UL, IEC-60947-2 compliance, or IP enclosure ratings are required for your installation and request formal documentation from Eaton to ensure regulatory alignment.
A 50 kAIC rating provides substantial protection against high fault currents, reducing the likelihood of equipment damage and associated downtime. Over the life of a panel, this can translate to lower maintenance costs, fewer catastrophic failures, and a shorter payback period for automated systems, especially in facilities with high inrush or motor startup currents.