Eaton NZMN3-AE400 Molded Case Circuit Breaker - 50 kAIC
Part Number: NZMN3-AE400
Quick Summary
The Eaton NZMN3-AE400 molded case circuit breaker provides reliable overcurrent protection for electrical distribution systems up to 690 V. For panel builders facing nuisance trips and downtime, precise protection coordination and adjustable OL settings help maintain uptime and safety. Compliance details are provided by the manufacturer; confirm certification status with Eaton for CE/IEC labeling and related ratings. This model’s front-screw terminals, rugged three-pole NZMN3 frame, and motor-drive compatibility deliver reliable protection in industrial panels while supporting fast installation, straightforward maintenance, and scalable protection as systems grow. Designed for distribution protection in manufacturing, energy, and process environments, it offers predictable trip behavior and long service life.
Product Information
Extended Description
NZMN3-AE400 Eaton: Eaton Series NZM complete molded case circuit breaker, NZM3-frame, NZMN3, Thermal-magnetic trip, Three-pole, 400A, Dist. circuit prot., Rocker lever, motor drive, 200-400A, 800-4400A delayed, Front screw, 200-400A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMN3-AE400
EAN
4015082591144
Product Length/Depth
6.535 in
Product Height
5.512 in
Product Width
5.512 in
Product Weight
15.335 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
50 kAIC at 415 Vac 42 kAIC at 480 Vac
Connection
Front screw
Overload range
200-400A
Number of poles
Three-pole
Compact circuit-breakers and switch-disconnectors up to 1600 A
Eaton Specification Sheet - NZMN3-AE400
Feature → Business Impact → Application: Amperage rating of 400 A provides robust feeder protection for mid-size industrial circuits, reducing nuisance trips and extending component life in 690 V systems; ideal for distribution panels in manufacturing lines and process facilities. Feature → Business Impact → Application: Short-circuit breaking capacity of 50 kAIC (50 kAIC at 415 Vac and 42 kAIC at 480 Vac) delivers high-energy fault handling, minimizing damage and downtime during faults in motor drives and feeders. Feature → Business Impact → Application: Adjustable setting range OL protector from 200-400 A and a delayed range of 800-4400 A enable precise coordination with upstream devices, improving selectivity and safety in complex MCCs and switchgear. Feature → Business Impact → Application: Thermal-magnetic trip and T268 trip type provide fast, predictable interruptions under overload or short-circuit conditions, enhancing reliability in critical automation loops. Feature → Business Impact → Application: Front screw connection and available accessories (rocker lever, motor drive) simplify wiring, commissioning, and retrofits, reducing installation time and maintenance costs. Feature → Business Impact → Application: NZM3 frame with three poles ensures compact, modular protection for distribution circuits, enabling scalable panel design and ease of replacement in evolving control architectures.
Get a Quick Quote for a Eaton NZMN3-AE400
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton NZMN3-AE400?
Enquire Now
FAQs
NZMN3-AE400 uses front-screw terminals designed for straightforward wiring in three-pole configurations. The front-access design simplifies panel mounting and serviceability, reducing installation time and exposure to wiring errors. Compatible with rocker lever accessories and motor-drive options, it supports streamlined commissioning and maintenance within standard distribution panels.
Key ratings include a 400 A amperage rating, 690 V AC voltage rating, and a short-circuit breaking capacity of 50 kAIC (42 kAIC at 480 V). The device features a T268 trip type, 200–400 A OL protection setting, and an 800–4400 A delayed range, making it suitable for coordinated protection in industrial feeders and MCCs.
Yes. The NZMN3-AE400 supports motor-drive environments through its motor-drive accessories and robust interrupt capacity. The combination of a three-pole NZM3 frame, front-screw connections, and adjustable protection settings helps protect motors and drives while enabling smooth integration into automation cabinets and control panels.
The product is covered under Eaton’s policy, typically 25-000, with a one-year warranty from installation or eighteen months from shipment, whichever comes first. For compliance and certification specifics, consult Eaton’s documentation and support to confirm current approvals for your region and application.
Official documentation includes the Eaton Specification Sheet for NZMN3-AE400 and the catalog on compact circuit-breakers up to 1600 A. Both sources provide detailed electrical ratings, installation instructions, accessory options, and setting guidance to assist with design, selection, and commissioning in industrial panels.