Eaton NZMN4-AE1250 Molded Case Circuit Breaker - UL Listed
Part Number: NZMN4-AE1250
Quick Summary
NZMN4-AE1250 molded case circuit breaker is a compact protective device that reliably interrupts overcurrent events in industrial power distributions. Engineers often struggle with downtime and nuisance trips when protection settings don’t align with system demand. UL Listed certification ensures safety compliance, and the 690 V AC rating with a 50 kAIC short-circuit capability supports robust operation in demanding environments; regional CE marking or IP requirements should be verified for your locale. For procurement, the 3-pole NZMN4 frame with bolt-on terminals simplifies installation and stock planning, delivering measurable improvements in reliability and maintenance efficiency.
Product Information
Extended Description
NZMN4-AE1250 Eaton: Eaton Series NZM complete molded case circuit breaker, NZM4-frame, NZMN4, Thermal-magnetic trip, Three-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-AE1250
EAN
4015082657611
Product Length/Depth
8.15 in
Product Height
8.268 in
Product Width
8.268 in
Product Weight
42.282 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
Three-pole
Thermal-magnetic trip (T268) provides fast, coordinated protection for industrial power distribution systems, reducing damage from overloads and short circuits. This built-in protection supports reliable feeder protection for panels serving motors and process equipment, shortening downtime and lowering repair costs by preventing cascading faults. With a 1250 A amperage rating and 690 V AC operating voltage, NZMN4-AE1250 handles heavy feeder currents common in manufacturing lines, and the bolt-on terminals with front-screw connections simplify in-field installation, reducing commissioning time and improving maintenance practicality. The NZM4 frame aligns with common replacement parts, enabling plug-compatible upgrades and streamlined sourcing for spare components. Short-circuit breaking capacity of 50 kAIC at 400 Vac delivers robust fault coping for high-energy electrical networks, while the adjustable short-circuit release range (2500-15000 A) and OL protection range (630-1250 A) enable precise coordination for critical circuits. Accessories such as rocker lever and motor-drive options extend control capabilities, enhancing operability in control panels and automatic start-stop configurations. Overall, the device supports reliable, scalable distribution circuit protection with safe, front-access installation and retrofit potential for existing switchgear.
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FAQs
NZMN4-AE1250 uses a front-screw, bolt-on terminal design within the NZM4 frame, enabling straightforward retrofits and straightforward sourcing of compatible busbar layouts. This arrangement supports quick panel upgrades without major rewiring, helping HVAC, manufacturing, and process facilities minimize downtime during modernization projects.
The device provides a 1250 A amperage rating and 690 V AC operating voltage with a 50 kAIC short-circuit breaking capacity at 400 Vac. The T268 thermal-magnetic trip ensures rapid response to overload and short-circuit conditions, while the 630-1250 A OL protector range and 2500-15000 A delayed setting support coordinated protection for critical feeders.
Yes. The unit supports motor feeder protection within distribution circuits, offering bolt-on terminals for reliable connections and availability of motor-drive accessories. The three-pole configuration and front-access design simplify motor-control panel integration, delivering predictable coordination with protective relays and starters in manufacturing environments.
The NZMN4-AE1250 is UL Listed, providing recognized safety assurance for North American installations. While CE marking and IP ratings are common regional expectations, verify your locale’s specific requirements with local electrical codes and Eaton support to ensure full regulatory compliance for your application.
Eaton’s policy for this product aligns with a one-year warranty from installation or 18 months from shipment, whichever occurs first. Regular maintenance includes inspecting front-access terminals, verifying torque on bolt-on connections, and confirming proper operation of the thermal-magnetic trip. This schedule supports reliable performance and predictable total cost of ownership in steady-state distribution protection.