Eaton NZMN3-AE250-NA Molded Case Breaker - 50 kAIC
Part Number: NZMN3-AE250-NA
Quick Summary
Eaton NZMN3-AE250-NA molded case circuit breaker protects 3-phase power distribution and motor circuits in industrial control panels. This MCCB minimizes nuisance trips and simplifies maintenance with a front-facing screwdriver connection and a compact footprint. Typical protections include CE marking, UL/CSA listings, and regional approvals—verify exact certifications on Eaton’s datasheet. With the NZM3 frame and adjustable trip ranges, the solution scales from lightweight automation to heavy motor loads, delivering reliability and safety. By aligning with standard industrial practices, it helps engineers reduce downtime, meet compliance, and optimize panel space while supporting future upgrades in control architectures.
Product Information
Extended Description
NZMN3-AE250-NA Eaton: MCCB NZM, NZM3 TM and Elec. Breakers, Circuit Breaker, 125-250A OL Prot. Rng, Screw connection, front, Three-pole, 250A Perm. Current, 50 kA, 125-250A Set. Rng OL Prot., 500-2750A Undelayed Adj. Rng., Rocker lever, motor drive optional
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMN3-AE250-NA
EAN
4015082692995
Product Length/Depth
6.535 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
Contact Manufacturer
Amperage Rating
250 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
500-2750A delayed
Setting Range Ol Protector
125-250A
Short-circuit breaking capacity
50 kAIC
Interrupt rating
42 kAIC at 480 Vac 50 kAIC at 415 Vac
Connection
Front screw
Overload range
125-250A
Number of poles
Three-pole
Feature: 250 A amperage rating and 690 V AC voltage capability with a three-pole NZMN3 frame. Business impact: Provides robust, coordinated protection for heavy loads and 3-phase feeders, reducing risk of equipment damage and unplanned downtime. Application: Ideal for motor control centers and distribution panels in manufacturing environments. Feature: Adjustable overload protection 125-250 A and delayed short-circuit release 500-2750 A. Business impact: Enables precise coordination with motor starting currents and system fault levels, improving selectivity and reducing unnecessary trips. Application: Suitable for pumps, conveyors, and drives in process lines. Feature: Front screw connection and compact footprint (6.535 in depth, 5.512 in height and width). Business impact: Eases installation and future panel retrofits, lowers wiring complexity, and improves serviceability. Application: retrofit projects and new panel builds where space is at a premium. Feature: High interrupt ratings 50 kAIC (50 kAIC at 415 V) and 42 kAIC (at 480 V). Business impact: Strengthens fault handling in demanding industrial environments, supporting safety and uptime through reliable fault interruption. Application: Upstream feeders and critical machines in automation lines. Feature: Optional accessories including rocker lever and motor drive support. Business impact: Improves operability and control integration, enabling quick manual actions and streamlined motor-drive coordination. Application: Systems requiring flexible control interfaces and streamlined commissioning. Feature: Warranty and service terms. Business impact: Provides assurance and predictable cost of ownership with a one-year warranty from installation or eighteen months from shipment. Application: Standard industrial deployment with formal supplier support.
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FAQs
Yes. This unit uses a three-pole NZM3 frame rated for 690 V AC and front screw terminals, enabling straightforward integration into standard 3-phase panels. The 125-250 A overload setting and 500-2750 A delayed short-circuit range support proper coordination with motor loads and feeders while preserving space efficiency.
The device offers an overload protection range of 125-250 A and a short-circuit release range of 500-2750 A (delayed). This enables precise selectivity with motor starters and feeders, reducing nuisance trips while ensuring fast response to faults.
Yes. With three-pole configuration, front-accessible installation, and optional motor drive accessory, this MCCB supports motor control center applications and drive coordination. The 50 kAIC interrupt rating provides robust fault interruption for drive-related faults while maintaining system reliability.
Certifications vary by region; typical marks include CE and UL/CSA listings. For exact certification details, refer to Eaton’s specification sheet and your regional approvals. The product page notes Certifications as ‘Contact Manufacturer,’ so confirm the current marks on the latest Eaton datasheet before procurement.
The warranty is one year from installation or eighteen months from shipment, whichever occurs first. Eaton’s Selling Policy provides the basis for coverage. For service, parts, and support, consult the Eaton datasheet and local distributor terms to align with project timelines and maintenance plans.