Eaton NZMN4-4-AE1250 MCB - 50 kAIC at 400V
Part Number: NZMN4-4-AE1250
Quick Summary
The Eaton NZMN4-4-AE1250 molded case circuit breaker provides reliable, high-capacity protection for industrial distribution panels and switchgear. This device helps engineers prevent cascading faults by offering precise thermal-magnetic trip and robust short-circuit interruption. Designed for challenging environments, it supports front-screw bolt-on assembly and four-pole configuration, enabling streamlined installation and easy maintenance. With UL Listed certification, it aligns with strict safety standards while supporting regional installation practices. This solution also pairs with the NZM4 frame for scalable protection in medium- to high-current applications, delivering long-term cost savings through reduced downtime and simpler spare-part management.
Product Information
Extended Description
NZMN4-4-AE1250 Eaton: Eaton Series NZM complete molded case circuit breaker, NZM4-frame, NZMN4, Thermal-magnetic trip, Four-pole, 1250A, 690 Vac, 50 kAIC at 400 Vac, Bolt-on, Distribution circuit protect., 630-1250A, 2500-15000A delayed, Front screw, 630-1250A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMN4-4-AE1250
EAN
4015082659158
Product Length/Depth
8.15 in
Product Height
11.024 in
Product Width
11.024 in
Product Weight
55.594 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
1250 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
2500-15000A delayed
Setting Range Ol Protector
630-1250A
Short-circuit breaking capacity
50 kAIC
Interrupt rating
50 kAIC at 400 Vac
Connection
Front screw
Overload range
630-1250A
Number of poles
Four-pole
NZMN4-4-AE1250 leverages the NZM4 frame to deliver four-pole protection with bolt-on terminals for quick, secure installations in distribution panels. The 1250 A amperage rating supports high-load feeders, reducing the need for multiple devices and cutting panel footprint, which translates to lower installation costs and easier spare-part planning. With a 690 V AC rating and a 50 kAIC short-circuit capacity at 400 V, it provides robust fault interruption for motor drives and feeders, improving uptime and safeguarding equipment in demanding processes. The thermal-magnetic Trip Type T268 ensures selective coordination, while the 630-1250 A OL protection setting and 2500-15000 A delayed short-circuit release deliver precise protection against overloads and faults. Front screw terminals and a rocker lever, plus motor-drive accessories, simplify mounting, diagnostics, and remote control compatibility. UL Listed certification reinforces regulatory compliance and purchase confidence, while the 8.15 in length, 11.024 in height and width with a 55.594 lb weight support stable, mechanical mounting in control cabinets and MCCs. This combination reduces maintenance overhead and accelerates panel upgrades with a proven, scalable solution.
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FAQs
The NZMN4-4-AE1250 is designed for industrial distribution panels, motor control centers, and switchgear in medium- to high-current applications. Its four-pole, bolt-on design and front-screw terminals enable straightforward mounting in control cabinets and feeder sections, while the NZM4 frame provides scalable protection for growing electrical networks.
Key ratings include an amperage rating of 1250 A, voltage rating of 690 V AC, and a short-circuit breaking capacity of 50 kAIC at 400 V. The device features a four-pole configuration, T268 thermal-magnetic trip, and front screw terminals, with a 630-1250 A OL protection range and 2500-15000 A delayed short-circuit release.
Yes. NZMN4-4-AE1250 uses bolt-on terminals and front-screw connections, which simplifies mounting in existing switchgear and MCCs, reduces retrofit time, and supports secure, vibration-resistant assembly in challenging environments.
The product is UL Listed, ensuring compliance with recognized safety standards for electrical protection devices. Certification supports safe operation in North American applications and simplifies regulatory acceptance for panel assembly and field installations.
Warranty coverage aligns with Eaton’s policy: one year from installation or eighteen months from shipment, whichever occurs first. This provides protection against manufacturing defects and supports planned maintenance and spare-part planning for uptime guarantees.