Eaton NZMN4-AEF1200-NA Molded Case Circuit Breaker - 50 kAIC
Part Number: NZMN4-AEF1200-NA
Quick Summary
Eaton NZMN4-AEF1200-NA molded case circuit breaker protects distribution panels while delivering reliable, high-capacity protection in industrial environments. Designers often struggle with balancing short-circuit protection and installation footprint within crowded switchgear. This device offers a robust 1200 A amperage rating, 600 Vac operation, and a 50 kAIC interrupt rating at 400 Vac, supporting demanding motor drives and power distribution needs. UL Listed, IEC Rated, and CSA Certified, it meets essential industry and regional compliance requirements. By combining easy bolt-on terminals with front screw connections, it also streamlines field wiring and serviceability, translating into faster commissioning and lower total cost of ownership. For panel builders and maintenance teams, it adds a trustworthy layer of protection and operational reliability.
Product Information
Extended Description
NZMN4-AEF1200-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM4-frame, NZMN4, Thermal-magnetic trip type, Three-pole, 1200A, 600 Vac, 50 kAIC at 400 Vac, Bolt-on, Distribution circuit protection, Rocker lever, motor drive, Front screw
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMN4-AEF1200-NA
UPC
786685631356
Product Length/Depth
8.15 in
Product Height
8.27 in
Product Width
8.27 in
Product Weight
46.2 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.
Certifications
UL Listed IEC Rated CSA Certified
Amperage Rating
1200 A
Voltage rating
600 Vac
Trip Type
T268
Circuit breaker type
NZMN4
Terminals
Bolt-on
Frame
NZM4
Class
Distribution circuit protection
Accessories
Rocker lever, motor drive
Interrupt rating
50 kAIC at 400 Vac
Connection
Front screw
Number of poles
Three-pole
NZMN4-AEF1200-NA is designed to maximize protection efficiency and installation ease. Feature: Thermal-magnetic trip type (T268) provides fast fault isolation while minimizing nuisance trips. Business impact: Improved reliability and reduced downtime in busy automation lines, supporting higher line uptime and productivity. Application: Distribution circuit protection in industrial panels with three-pole, front screw connections for straightforward wiring. Feature: 1200 A amperage rating paired with a 50 kAIC interrupt rating at 400 Vac ensures safe handling of high fault currents. Business impact: Greater system resilience and improved fault clearance, reducing equipment damage and maintenance costs. Application: Large-motor drives and critical feeders in manufacturing facilities. Feature: Bolt-on terminals and NZM4 frame compatibility deliver flexible mounting and straightforward retrofit options. Business impact: Faster installation, easier upgrades, and reduced field labor costs. Application: Retrofit projects and new builds using the NZM4 family. Feature: Rocker lever and motor drive accessories simplify operation and integration with automation controls. Business impact: Intuitive use, better operator experience, and easier integration with protective relays. Application: Control environments requiring quick manual trips and accessory-enabled control schemes. Feature: Certifications UL Listed, IEC Rated, CSA Certified. Business impact: Ensured regulatory compliance across North America and international sites, easing procurement audits. Application: Panels that must meet multiple certification requirements for global deployments. Industry context: Designed for distribution protection in electrical cabinets and motor control centers, with a focus on reliability, ease of installation, and industry-standard certification alignment.
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FAQs
NZMN4-AEF1200-NA is designed for the NZM4 frame and features front screw connections with bolt-on terminals, enabling straightforward replacement or upgrade in existing NZM4-based panels without major enclosure changes or rewiring.
The unit offers a 50 kAIC interrupt rating at 400 Vac, so it provides rapid fault interruption for high short-circuit currents, protecting downstream components and reducing the risk of equipment damage.
Yes. With a 1200 A rating and three-pole configuration plus a thermal-magnetic trip, NZMN4-AEF1200-NA supports motor drives and distributed loads, delivering selective protection and safe motor shutdowns.
The part is UL Listed, IEC Rated, and CSA Certified, ensuring compliance across North American and international markets, simplifying procurement audits and enabling global deployment.
Front screw terminals and bolt-on mounting simplify wiring and field upgrades, while the rugged NZM4 frame supports long service life in harsh environments, reducing maintenance interruptions and spare-part needs.