Eaton NZMN3-AEF500-NA MCCB - UL Listed, 550A, 690V
Part Number: NZMN3-AEF500-NA
Quick Summary
The Eaton NZMN3-AEF500-NA MCCB provides reliable overcurrent protection for 690 V industrial power distribution. This compact yet capable device helps prevent damage to feeders, motors, and downstream equipment. Users often struggle with coordinating protection across high-energy panels without nuisance trips or slow response times. UL Listed certification ensures safety and reliability, while the NZMN3 frame and T268 trip type support precise coordination in distribution panels. In practice, this means faster commissioning, lower downtime, and scalable protection for modern industrial facilities. This solution also aligns with common project requirements for front-termination, robustness, and compatibility with motor drives, delivering real business value across automation and electrical infrastructure.
Product Information
Extended Description
NZMN3-AEF500-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM3-frame, NZMN3, Thermal-magnetic trip, 1000-4000A delayed, Three-pole, 550A, 690 Vac, 50 kAIC at 415 Vac, 42 kAIC at 480 Vac, Distribution circuit protect., Front screw, 500-500A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMN3-AEF500-NA
EAN
4015082692803
Product Length/Depth
5.512 in
Product Height
5.512 in
Product Width
5.512 in
Product Weight
13.977 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
550 A
Voltage rating
690 V AC
Trip Type
T268
Circuit breaker type
NZMN3
Frame
NZM3
Class
Distribution circuit protection
Accessories
Rocker lever, motor drive
Setting Range Ol Protector
500-500A
Short-circuit breaking capacity
50 kAIC
Interrupt rating
50 kAIC at 415 Vac 42 kAIC at 480 Vac
Connection
Front screw
Overload range
500-500A
Number of poles
Three-pole
Trip rating
1000-4000 A delayed
Feature: 550 A amperage rating paired with a 50 kAIC interrupt capacity at 415 V provides robust short-circuit protection for 690 V systems. Business impact: minimizes damage to feeders and downstream equipment, reducing maintenance costs and unplanned downtime. Application: suitable for main feeders in industrial distribution panels and motor control centers. Feature: NZM3 frame with three-pole configuration enables compact, scalable protection in dense cabinets. Business impact: saves panel space and simplifies future expansion while maintaining reliable protection coverage. Application: construction of large control panels and retrofit projects where space is at a premium. Feature: Thermal-magnetic T268 trip enhancements deliver fast overload protection without nuisance tripping on inrush events. Business impact: improves uptime and lifecycle of motors and drives. Application: motor-intensive lines and high-inertia loads. Feature: Front screw termination and 500-500A setting range allow straightforward field wiring and precise overload coordination. Business impact: reduces installation time and supports tuning for existing protection schemes. Application: standard distribution panels and retrofit installations. Feature: Accessories including rocker lever and motor drive enable remote operation and ergonomic control. Business impact: simplifies commissioning and maintenance, boosting operator efficiency. Application: automation cabinets and panel boards requiring quick control access. Feature: UL Listed certification and rugged construction. Business impact: ensures compliance and reliability in harsh industrial environments. Application: global manufacturing sites needing compliant protection devices.
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FAQs
Install the NZMN3-AEF500-NA in a distribution panel using the front screw termination with a three-pole NZM3 frame. Ensure proper alignment with bus bars, secure all terminations, and verify compatible panel clearance. The device is designed for straightforward retrofit and panel-packing, minimizing wiring complexity while maintaining robust protection. Verify 690 V AC compatibility and confirm that protective settings align with the 500-500 A overload range.
Key performance specs include a 550 A amperage rating, 690 V AC voltage rating, and a short-circuit interrupt capacity of 50 kAIC at 415 V and 42 kAIC at 480 V. The trip type is thermal-magnetic T268, and the device is a three-pole NZMN3 frame unit with front termination. These specs support reliable protection coordination for demanding industrial loads and large motor drives.
Yes. The NZMN3-AEF500-NA is designed for motor control centers and distribution panels requiring rugged protection at 690 V. Its three-pole configuration, NZM3 frame, and availability of motor-drive accessories make it compatible with standard MCCB architectures. Front screw connections simplify wiring, and the 500-500 A overload setting supports precise protection coordination for motor feeders.
The NZMN3-AEF500-NA is UL Listed, reflecting compliance with established electrical safety standards for industrial protection devices. This certification supports audit readiness and safe integration into critical power systems. For local requirements, verify regional compliance needs, but UL listing provides a solid baseline for North American installations.
Maintenance benefits from its robust construction, front termination, and available accessories like rocker lever and motor drive. The Eaton policy offers a one-year warranty from installation or 18 months from shipment. A reliable protection device reduces downtime, lowers repair costs, and improves productivity, delivering a favorable return on investment in high-demand industrial environments.