Eaton NZMH3-VEF400-NA Molded Case Circuit Breaker - 100 kAIC
Part Number: NZMH3-VEF400-NA
Quick Summary
NZMH3-VEF400-NA is a high-current molded case circuit breaker for industrial protection and selective generation applications. Engineers often face nuisance trips and retrofit challenges when upgrading 690 V systems. Compliance details are managed by the manufacturer; confirm approvals with Eaton for your region. This NZM3-frame device supports selective and generator protection, delivering reliable performance and reduced downtime for industrial power distribution. Ideal for motor control centers, panel builders, and OEMs seeking robust protection and simple installation with front-screw connections.
Product Information
Extended Description
NZMH3-VEF400-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM3-frame, NZMH3, Thermal-magnetic trip, Three-pole, 400A, 690 Vac, 100 kAIC at 480 Vac, Selective and gen. protect., 400-400A, Front screw, 400-400A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMH3-VEF400-NA
EAN
4015082693190
Product Length/Depth
5.51 in
Product Height
6.53 in
Product Width
6.53 in
Product Weight
5.5 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.
Compliances
Contact Manufacturer
Amperage Rating
400 A
Voltage rating
690 V AC
Trip Type
T268
Circuit breaker type
NZMH3
Frame
NZM3
Class
Selective and generator protection
Accessories
Rocker lever, motor drive
Adjustment range short-circuit release
800-4000A delayed, 800-4400A delayed
Setting Range Ol Protector
400-400A
Short-circuit breaking capacity
150 kAIC
Interrupt rating
100 kAIC at 480 Vac
Connection
Front screw
Overload range
400-400A
Number of poles
Three-pole
Three-pole NZMH3 frame protection delivers coordinated, space-efficient protection within larger electrical panels, reducing wiring complexity and improving maintenance cycles. Business impact: faster fault isolation and easier panel upgrades. Application: MCCs and distribution panels requiring reliable three-phase protection in harsh industrial environments. The 400 A rating paired with 690 V AC capability supports high-demand feeders, enabling manufacturers to consolidate devices without compromising safety or timing of protective action. Business impact: improves uptime and overall equipment effectiveness (OEE) by minimizing unplanned shutdowns. Application: heavy-duty machinery and conveyors where short-circuit events must be contained quickly with minimal collateral damage. Thermal-magnetic trip (T268) enhances selectivity and generator protection, with a short-circuit breaking capacity up to 150 kAIC and 100 kAIC at 480 Vac. Business impact: tighter protection coordination and reduced arc energy during faults. Application: critical power paths in manufacturing lines and transformer-fed systems. Front-screw connection and available accessories (rocker lever, motor drive) simplify installation, service, and future upgrades. Business impact: faster commissioning, easier field maintenance, and flexibility for OEM panel builds. Application: OEM enclosures and retrofit projects where accessibility and adaptability matter. Compact footprint (5.51 in depth; 6.53 in height and width) and a 5.5 lb weight enable easy integration in confined spaces, reducing panel size and material costs. Warranty alignment (one year from installation or eighteen months from shipment) adds predictable risk coverage for project timelines. Application: procurement and lifecycle planning for industrial electrical protection.
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FAQs
To install, connect three-phase conductors to the front screw terminals of the NZMH3-VEF400-NA, ensuring correct phasing and tight torque per manufacturer guidelines. Mount the device on a suitable panel cutout within the NZM3 frame, and verify compatible accessories such as the rocker lever or motor drive. Confirm overall panel clearance for front accessibility and perform a post-installation functional check to validate trip operation and coordination with upstream protection.
Key specifications include a 400 A amperage rating, 690 V AC voltage rating, three-pole configuration, and T268 trip type. It provides a short-circuit breaking capacity of up to 150 kAIC, with 100 kAIC at 480 V, enabling effective fault isolation. The device uses front screw connections and is designed for the NZM3 frame with selective and generator protection capabilities.
Yes. The NZMH3-VEF400-NA is rated for selective and generator protection, featuring coordination suitable for complex electrical distribution where precise fault isolation is essential. With a 400 A rating and high short-circuit withstand, it helps protect critical loads while preserving downstream circuits. Ensure system design aligns with Eaton’s recommended protection schemes for generators and feeder circuits.
Compliances are managed by the manufacturer; confirm your region’s required certifications with Eaton. Typical regulatory considerations include safety and performance standards relevant to industrial protection equipment. When planning procurement, request Eaton’s official certification documentation for your installation locale to ensure full regulatory alignment and compliant deployment.
The NZMH3-VEF400-NA supports long-term reliability with simple front-screw installation and available accessories for quick field adjustments (rocker lever, motor drive). Warranty is one year from installation or eighteen months from shipment, whichever occurs first, aiding project planning and risk assessment. Reduced downtime from precise protection and coordination translates into lower maintenance costs and higher equipment availability.