Eaton NZMN3-AE400-NA Molded Case Circuit Breaker - UL/CSA/IEC
Part Number: NZMN3-AE400-NA
Quick Summary
The Molded Case Circuit Breaker delivers reliable protection for electrical panels and motor drives in industrial settings. The Eaton NZMN3-AE400-NA offers a three-pole, 400 A device rated at 690 V AC with a thermal-magnetic trip for fast fault isolation. Front screw connections and the NZM3 frame simplify panel installation and maintenance, addressing common field challenges like wiring congestion and service access. It complies with UL/CSA and IEC standards, supporting regulatory acceptance and procurement efficiency. With adjustable trip ranges (200–400 A OL) and 800–4400 A delayed releases, you gain precise protection and reduced downtime, aligning with modernizing machine controls and energy-management initiatives.
Product Information
Extended Description
NZMN3-AE400-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM3-frame, NZMN3, Thermal-magnetic trip, Three-pole, 400A, Dist. circuit protection, motor drive, 200-400A, 800-4400A delayed, Front screw, 200-400A, conforms to UL/CSA and IEC
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMN3-AE400-NA
EAN
4015082693008
Product Length/Depth
6.535 in
Product Height
5.512 in
Product Width
5.512 in
Product Weight
15.386 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
400 A
Voltage rating
690 V AC
Trip Type
T268
Circuit breaker type
NZMN3
Frame
NZM3
Class
Distribution circuit protection
Accessories
Rocker lever, motor drive
Adjustment range short-circuit release
800-4400A delayed
Setting Range Ol Protector
200-400A
Short-circuit breaking capacity
50 kAIC
Interrupt rating
42 kAIC at 480 Vac 50 kAIC at 415 Vac
Connection
Front screw
Overload range
200-400A
Number of poles
Three-pole
The NZMN3-AE400-NA provides precise, reliable distribution protection for industrial panels, with a 400 A amperage rating and a 690 V AC operating voltage. This enables safe, scalable protection for motor drives and heavy-load circuits in manufacturing environments, improving uptime and equipment longevity. The thermal-magnetic T268 trip type delivers fast fault clearance while minimizing nuisance trips, which translates to lower maintenance costs and better process stability. The unit’s short-circuit release is adjustable from 800 to 4400 A (delayed), allowing tight coordination with upstream protection schemes and reducing costly downstream outages. A 50 kAIC short-circuit breaking capacity (42 kAIC at 480 Vac and 50 kAIC at 415 Vac) supports high fault currents common in industrial facilities, enhancing system reliability. Front-screw connections and the NZM3 frame simplify installation, wiring, and future relocations, yielding faster panel upgrades and easier maintenance. Accessories like rocker lever and motor-drive options extend compatibility with modern machine controls, supporting OEMs and panel builders in achieving streamlined integration and reduced part numbers.
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FAQs
The NZMN3-AE400-NA is engineered for 690 V AC systems and uses front screw terminals, streamlining panel integration, wiring, and future servicing. Its NZM3 frame and three-pole design support reliable distribution protection in compact panel layouts, reducing installation time and simplifying maintenance.
This device uses a thermal-magnetic trip (T268) with a short-circuit breaking capacity of 50 kAIC, rated 42 kAIC at 480 V and 50 kAIC at 415 V. It also offers an adjustable short-circuit release from 800 to 4400 A delayed and an overload protection setting range of 200–400 A, enabling precise coordination with upstream protection and improved reliability.
Yes. The unit is designed for distribution protection in motor drives and machine controls, with compatible accessories such as rocker lever and motor-drive options. Its 400 A, 690 V rating, along with front-access installation, supports robust protection in automated equipment while simplifying retrofit and upgrade projects.
The NZMN3-AE400-NA complies with UL/CSA and IEC standards, offering regulatory acceptance across North America and international markets. This broad certification support facilitates panel approvals, supplier qualification, and streamlined procurement in regulated industries.
Eaton’s warranty policy 25-000 provides one year from installation or eighteen months from shipment, whichever occurs first. Reliable protection with minimal nuisance trips reduces downtime and maintenance costs, contributing to a lower total cost of ownership over the equipment lifecycle.