Eaton NZMH3-AEF250-NA NZM complete molded case circuit breaker - UL Listed
Part Number: NZMH3-AEF250-NA
Quick Summary
Eaton NZMH3-AEF250-NA is a rugged, three-pole molded case circuit breaker designed for high-demand electrical distribution. Engineers often struggle with nuisance trips and inconsistent protection in motor drives and distribution panels, leading to downtime and maintenance costs. The UL Listed NZMH3 design supports 690 V AC operation and a 250 A rating within the Series NZM NZM3 frame, delivering reliable protection and predictable coordination. By combining compact form with a front-access mounting and rocker lever, it enables faster commissioning and safer service, reducing lifecycle costs while keeping critical systems safeguarded.
Product Information
Extended Description
NZMH3-AEF250-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM3-frame, NZMH3, Thermal-magnetic trip type, Three-pole, 250A, 690 Vac, 100 kAIC at 480 Vac, Distribution circuit protection, Rocker lever, motor drive, 125-250A, Front screw
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMH3-AEF250-NA
EAN
4015082692834
Product Length/Depth
11.693 in
Product Height
5.512 in
Product Width
6.535 in
Product Weight
13.95 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
250 A
Voltage rating
690 V AC
Circuit breaker type
NZMH3
Series
Series NZM
Frame
NZM3
Number of poles
Three-pole
Feature → The NZMH3-AEF250-NA is a three-pole, thermal-magnetic trip type breaker rated for 250 A at 690 V AC, with a 100 kAIC interrupting capacity. Business Impact → Ensures robust short-circuit clearance and protection coordination for motor drives and distribution panels, lowering the risk of cascading faults. Application → Ideal for industrial control cabinets and power distribution where reliable fault isolation is essential. Feature → NZM3 frame and NZMH3 configuration provide a compact footprint. Business Impact → Frees cabinet space and simplifies retrofits in existing NZM-based panels, reducing installation time and wiring complexity. Application → Suitable for modernizing legacy equipment with minimal enclosure changes. Feature → Front screw mounting and a rocker lever design. Business Impact → Streamlines wiring and maintenance, enabling quicker field servicing and safer operator interaction. Application → Common in panel assemblies where accessibility and ease of operation are prioritized. Feature → UL Listed certification and 690 V AC capability. Business Impact → Facilitates regulatory compliance and safe integration into high-voltage distribution networks, supporting audit readiness. Application → Suitable for global deployment in plants requiring formal safety recognition. Feature → 125–250 A motor drive protection and precise trip characteristics. Business Impact → Improves motor startup reliability and process uptime, reducing wear on drives and downstream equipment. Application → Critical for process lines and packaging, where uptime directly affects throughput. Feature → Front-access design for maintenance and quick replacement. Business Impact → Reduces downtime during fault events or maintenance, improving overall OEE. Application → Industrial facilities prioritizing rapid service and minimal equipment removal when servicing breakers.
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FAQs
NZMH3-AEF250-NA is designed for front-screw mounting within standard NZM3 frame enclosures. It fits common control panels and distribution boards that support molded case circuit breakers in the NZM series, enabling straightforward retrofits and consistent protection coordination without enclosure redesign. Always verify enclosure clearance and conductor routing per IEC/UL guidance.
The device is rated for 250 A and operates at 690 VAC, with an interrupting capacity of up to 100 kAIC at 480 VAC. It uses a thermal-magnetic trip mechanism (NZMH3) within the NZM3 frame and is part of the Series NZM protection lineup, suitable for high-demand distribution and motor drive protections.
Yes. With a 250 A rating, 690 VAC capability, and a thermal-magnetic trip, it provides precise coordination for motor drives and downstream feeders. Its front-screw mounting and compact NZM3 frame simplify integration into control cabinets, reducing wiring complexity and enabling reliable drive protection in industrial environments.
UL Listed indicates the breaker has undergone safety testing and meets recognized safety standards for electrical devices in the United States. It supports regulatory compliance for electrical installations and helps ensure safe operation in industrial panels and distribution systems, particularly where UL standards govern component approvals and interchangeability within NZM-based assemblies.
Expect reduced downtime due to robust thermal-magnetic protection and high interrupting capacity, which lowers fault-related damage. Maintenance involves periodic inspection of mechanical linkages and terminal voltage checks, with the advantage of front-access servicing. Long-term ROI arises from improved equipment protection, lower replacement costs, and higher fleet reliability in high-demand processes.