Eaton NZMN3-AE400-S1 Molded Case Breaker - 690V
Part Number: NZMN3-AE400-S1
Quick Summary
Eaton NZMN3-AE400-S1 Molded Case Breaker protects electrical distributions in industrial machinery and large electrical rooms. Operators often struggle to balance reliable protection with ease of maintenance, especially in high-current lines and motor-drive interfaces. This NZMN3 frame device aligns with IEC/EN 60947-2 standards and supports 50 kAIC short-circuit ratings, with 42 kAIC at 480 VAC and 50 kAIC at 415 VAC. For procurement teams, the 200–400 A OL Protector setting, front-screw mounting, and motor-drive accessories like rocker lever streamline installation and reduce downtime. In practice, this translates to safer startups, faster panel commissioning, and lower lifecycle costs for industrial plants.
Product Information
Extended Description
NZMN3-AE400-S1 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, IEC/EN 60947-2
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMN3-AE400-S1
EAN
4015082903688
Product Length/Depth
4.06 in
Product Height
8.25 in
Product Width
8.25 in
Product Weight
5.5 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
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
Feature: 400 A amperage rating. Business Impact: Robust protection for medium-to-high current distribution circuits reduces nuisance trips and protects motors and drives. Application: Plant wide motor feeders and machine controls where reliable overload protection is essential. Feature: 690 V AC voltage rating. Business Impact: Safe operation across the upper end of low-voltage industrial systems, enabling common use with 3-phase motors and drives. Application: Heavy machinery, conveyors, and process lines. Feature: T268 trip type with adjustable release (800-4400 A). Business Impact: Precise coordination for electrical protection schemes, enabling delayed fault clearing when needed and minimizing unwarranted outages. Application: Systems with motor starting transients and high-inrush loads. Feature: OL protector setting 200-400 A. Business Impact: Customizable protection to match actual load profiles, improving selectivity and reducing unnecessary trips. Application: Panel boards and distribution blocks with varied load segments. Feature: Front screw connection and three-pole NZMN3 frame. Business Impact: Simplified installation and maintenance, faster replacement, and clear three-phase protection for balanced systems. Application: New installations and retrofits in manufacturing lines and facilities with standard front-access panels. Feature: Accessories including rocker lever and motor drive option. Business Impact: Enhanced operability and precise control integration, supporting quick manual operation and seamless motor-drive control. Application: OEM equipment and retrofit projects requiring ergonomic control and drive compatibility. |
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FAQs
The NZMN3-AE400-S1 uses a front-screw connection designed for three-pole NZMN3 frame assemblies. This configuration enables straightforward panel mounting, rapid field replacement, and clean wiring access, reducing commissioning time and lowering maintenance costs in industrial facilities with limited panel depth.
This device is rated for 400 A and 690 V AC, with a short-circuit breaking capacity of 50 kAIC and an interrupt rating of 42 kAIC at 480 VAC or 50 kAIC at 415 VAC. It uses a thermal-magnetic trip (T268) and offers an adjustable short-circuit release range of 800–4400 A, with OL protector setting 200–400 A for coordination.
Yes. The product description references IEC/EN 60947-2, the standard for low-voltage circuit breakers. Its motor-drive compatibility is supported by optional accessories like a rocker lever and motor-drive capability, enabling safe integration with drive systems while maintaining reliable protection.
Its three-pole NZMN3 frame with 400 A rating and 690 V capability suits distribution circuits for industrial machines and plant infrastructure. The front-screw connection simplifies installation in compact panels, while the 50 kAIC fault current rating provides resilience against high transient faults common in manufacturing environments.
The product is covered under Eaton's warranty policy 25-000, offering one year from installation or eighteen months from shipment, whichever comes first. For additional assistance, contact Eaton support or your authorized distributor to confirm local terms and service options.