Eaton NZMN4-AE1000 Molded Case Breaker - 50 kAIC at 400V
Part Number: NZMN4-AE1000
Quick Summary
The Eaton NZMN4-AE1000 Molded Case Breaker protects distribution panels and switchgear in industrial facilities, delivering reliable overload protection. A common challenge is nuisance trips and slow fault response that can drive downtime and equipment damage. UL Listed certification confirms compliance with recognized electrical safety standards for industrial equipment. For engineers and procurement teams, this breaker offers scalable protection, easy bolt-on installation, and long-term reliability. Designed for high current applications, it supports 500–1000 A OL protection and up to 50 kAIC interrupt capacity. The front-screw, bolt-on terminals simplify wiring in dense panels, and optional accessories like rocker levers or motor drives expand control options.
Product Information
Extended Description
NZMN4-AE1000 Eaton: Eaton Series NZM complete molded case circuit breaker, NZM4-frame, NZMN4, Thermal-magnetic trip, Three-pole, 1000A, 690 Vac, 50 kAIC at 400 Vac, Bolt-on, Distribution circuit protect., 500-1000A, 2000-12000A delayed, Front screw, 500-1000A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMN4-AE1000
EAN
4015082657604
Product Length/Depth
8.15 in
Product Height
8.268 in
Product Width
8.268 in
Product Weight
42 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
Amperage Rating
1000 A
Voltage rating
690 V AC
Trip Type
T268
Circuit breaker type
NZMN4
Terminals
Bolt-on
Frame
NZM4
Class
Distribution circuit protection
Accessories
Rocker lever, motor drive
Adjustment range short-circuit release
2000-12000A delayed
Setting Range Ol Protector
500-1000A
Short-circuit breaking capacity
50 kAIC
Interrupt rating
50 kAIC at 400 Vac
Connection
Front screw
Overload range
500-1000A
Number of poles
Three-pole
Feature → Business Impact → Application: The 1000 A amperage rating paired with a 50 kAIC breaking capacity provides robust protection for high-current feeders, reducing the risk of cascading faults and downtime in manufacturing lines. Applications include modern distribution panels where reliability and uptime are critical. Feature → Business Impact → Application: Three-pole design with front screw terminals enables straightforward, safe wiring and faster panel assembly, improving installation efficiency and serviceability in tight electrical rooms. Feature → Business Impact → Application: Thermal-magnetic trip type T268 with an adjustable overload range (500–1000 A) allows precise coordination and selective tripping, minimizing unplanned outages while meeting process reliability requirements. Feature → Business Impact → Application: NZM4 frame and 690 V AC rating ensure compatibility with European and IEC-standard power systems, enabling scalable protection across multi-tier electrical schemes. Feature → Business Impact → Application: Optional accessories such as rocker lever and motor drive expand control and automation integration, reducing customization time and enabling seamless motor-contact protection. Feature → Business Impact → Application: Front-access installation and bolt-on terminals shorten commissioning times, improve maintenance access, and support compact panel layouts in industrial facilities.
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FAQs
NZMN4-AE1000 uses front screw terminals and bolt-on mounting, which simplifies wiring in compact distribution panels. It supports three-pole configurations and 690 V AC systems, making it compatible with most standard IEC/UL switchgear enclosures. For proper installation, follow panel design clearances, torque settings, and manufacturer torque specs to ensure reliable current paths and safe maintenance access.
The device features a thermal-magnetic trip type T268 with a 1000 A amperage rating. Protection ranges include an adjustable overload protector from 500 to 1000 A and a short-circuit release range of 2000 to 12000 A delayed, enabling selective coordination. It provides 50 kAIC interrupt capacity at 400 Vac, suitable for high fault currents in industrial facilities.
Yes, the NZMN4-AE1000 is UL Listed, indicating compliance with recognized safety standards for electrical equipment. This certification supports regulatory acceptance, simplifies supplier qualification, and enhances confidence in safe operation within panels and switchgear assemblies when designing protection schemes.
This breaker is ideal for distribution panels in manufacturing, process industries, and data centers where high-current protection and fast fault clearing are essential. Its 690 V AC rating, 50 kAIC capacity, and three-pole design support reliable power distribution across feeders while enabling scalable protection as systems grow. Front-access installation reduces downtime during maintenance.
Warranty follows Eaton policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. For maintenance, ensure proper torque on terminals, perform periodic thermal checks, and coordinate with upstream protection to minimize nuisance trips. Consider consulting Eaton for spare parts, motor-drive compatibility, and long-term reliability planning.