Eaton NZMN3-AEF250-NA Molded Case Circuit Breaker - 50 kAIC
Part Number: NZMN3-AEF250-NA
Quick Summary
NZMN3-AEF250-NA is a molded case circuit breaker designed to protect industrial power distribution and motor-control panels. Users often struggle with nuisance tripping, limited installation space, and complex commissioning. This device aligns with the NZM3 frame, offering a 250 A setting and 50 kAIC short‑circuit capacity, with a front‑screw connection and optional motor‑drive attachment. Certifications and approvals for industrial protection equipment vary by region and configuration; refer to Eaton datasheets for CE, IP, SIL ratings and region-specific compliance. By combining robust protection with easy installation, this MCCB supports efficient panel design, reduced downtime, and streamlined procurement.
Product Information
Extended Description
NZMN3-AEF250-NA Eaton: MCCB NZM, NZM3 TM and Elec. Breakers, Circuit Breaker, 250-250A OL Prot. Rng, Screw connection, front, Three-pole, 250A Perm. Current, 50 kA, 250-250A 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-AEF250-NA
EAN
4015082692759
Product Length/Depth
6.535 in
Product Height
5.512 in
Product Width
5.512 in
Product Weight
15.448 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
250-250A
Short-circuit breaking capacity
50 kAIC
Interrupt rating
50 kAIC at 415 Vac 42 kAIC at 480 Vac
Connection
Front screw
Overload range
250-250A
Number of poles
Three-pole
Feature 250 A amperage rating and 690 V AC rating → Business impact: precise overload protection for medium-to-high-load circuits, enabling safer, more economical panel designs → Application: distribution boards and motor circuits in manufacturing plants. Feature 50 kAIC short-circuit breaking capacity → Business impact: withstands high fault currents, improving system reliability and reducing downtime → Application: plant power distribution and fault- current management in heavy industry. Feature front screw connection → Business impact: facilitates faster, service-friendly installation and maintenance → Application: modular panel assemblies and retrofit projects. Feature three-pole NZM3 frame → Business impact: balanced phase protection and compact footprint, simplifying space planning → Application: motor control centers and distribution panels. Feature adjustable overload protection 250-250A and delayed range 500-2750A → Business impact: flexible coordination and selective tripping, lowering unnecessary power loss → Application: progressive protection schemes in process lines. Feature accessories including rocker lever and motor-drive option → Business impact: ergonomic operation and scalable control capabilities → Application: control rooms, MCCs, and retrofit scenarios. Relevant keywords: molded case circuit breaker, NZMN3, NZM3 frame, front screw, three-pole MCCB, 690 V AC, 50 kAIC, motor drive compatibility, distribution protection.
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FAQs
NZMN3-AEF250-NA supports a front screw connection for straightforward panel mounting and service access. It is a three-pole MCCB built on the NZM3 frame, designed for easy integration into distribution boards and motor control centers. Optional accessories like a rocker lever and motor-drive compatibility enhance ergonomic operation and control in confined installations.
The device is rated for 250 A and 690 V AC, with a short-circuit breaking capacity of 50 kAIC. It features a T268 trip type, adjustable overload protection in the 250–250 A range, and a delayed release adjustable from 500–2750 A. It is a three-pole unit with front connection, suitable for demanding industrial circuits.
Yes. The NZMN3-AEF250-NA is built on the NZM3 frame for reliable motor control and distribution protection. Its three-pole design and 50 kAIC interrupt rating make it appropriate for MCCs and distribution panels handling moderate to high fault currents, while front-access installation streamlines electrical assembly and maintenance.
Certification details for NZMN3-AEF250-NA are managed by Eaton and vary by configuration and region. Users should consult the Eaton datasheet and regional approvals (CE, IP, SIL where applicable) to confirm compliance for their specific installation and regulatory requirements.
Plan for routine inspection of connection integrity, mechanical operation of the trip mechanism, and verification of overload setting accuracy. The unit carries Eaton’s warranty policy and is designed for front-access servicing. For long-term reliability, use recommended accessories and ensure correct setting of the 250–250 A OL range and the 500–2750 A delayed release when coordinating protection in your system.