Eaton NZMH3-AE400-T-S1 Molded Case Breaker - 100 kAIC
Part Number: NZMH3-AE400-T-S1
Quick Summary
Eaton NZMH3-AE400-T-S1 molded case breaker provides robust distribution protection for industrial electrical systems. Engineers often wrestle with nuisance trips, misconfigured protection, and downtime; this unit offers precise thermal-magnetic trip and an adjustable 200-400 A range to match loads. In practice, devices of this class commonly align with CE compliance and UL safety standards, with IP-rated enclosures for harsh environments; consult Eaton's specification sheet for exact certifications. For project value, expect reliable protection, easier maintenance, and reduced lifecycle costs through front-access installation, earth fault protection, and scalable protection features that adapt as electrical systems evolve.
Product Information
Extended Description
NZMH3-AE400-T-S1 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, Distribution circuit protect., Earth fault protection, 200-400A, Front screw, 200-400A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMH3-AE400-T-S1
EAN
4015081176052
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
Special features
Earth fault protection
Amperage Rating
400 A
Voltage rating
690 V AC
Trip Type
T268
Circuit breaker type
NZMH3
Frame
NZM3
Class
Distribution circuit protection
Accessories
Rocker lever, motor drive
Adjustment range short-circuit release
800-4400A delayed, 200-400A delayed
Setting Range Ol Protector
200-400A
Short-circuit breaking capacity
100 kAIC
Interrupt rating
100 kAIC at 480 Vac
Connection
Front screw
Overload range
200-400A
Number of poles
Three-pole
Feature → Business Impact → Application: Amperage rating of 400 A paired with a 690 V AC voltage rating and a 100 kAIC interrupt capacity delivers strong fault handling for medium to large distribution circuits, reducing the risk of equipment damage and unplanned downtime in manufacturing lines and data centers. Application: Protects feeders and motor circuits in industrial plants while maintaining continuity of critical processes. Feature → Business Impact → Application: Earth fault protection enhances safety and protects downstream equipment from ground faults, improving uptime and reducing maintenance costs in harsh or damp environments. Application: Suitable for OEM panel boards, switchgear assemblies, and service distribution in automation cells. Feature → Business Impact → Application: NZMH3 frame and three-pole design deliver reliable, balanced protection for 3-phase systems, simplifying panel layout and wiring in compact switchgear. Application: Ideal for distribution circuit protection in energy-intensive facilities. Feature → Business Impact → Application: Front screw terminals enable quicker field installation and easier verification, cutting assembly time and minimizing wiring errors in critical installations. Application: Beneficial for retrofit projects and new builds where fast service entry is valued. Feature → Business Impact → Application: Adjustable trip and short-circuit release ranges (800-4400 A delayed; 200-400 A delayed; 200-400 A OL protection) support precise coordination with upstream protection, reducing nuisance trips and ensuring selective de-energization. Application: Essential for coordinating protection across complex automation lines. Feature → Business Impact → Application: Rocker lever and motor drive accessories simplify operation and motor-driven switching, improving operator ergonomics and enabling remote or automated control in modern control rooms.
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FAQs
The NZMH3-AE400-T-S1 is configured for front-screw connections and is rated for 690 V AC, making it suitable for many distribution panels and industrial switchgear assemblies. When wiring, verify enclosure clearance and ensure torque specifications meet Eaton guidelines to prevent loose connections and overheating. Always consult the latest Eaton specification sheet for installation details and compatibility notes.
Key specs include a 400 A amperage rating, 690 V AC voltage rating, and a short-circuit breaking capacity of 100 kAIC at 480 V. The trip type is T268, and the unit is a three-pole NZMH3 frame. These features support reliable protection coordination and fast fault clearance in distribution circuits common to industrial facilities.
Yes, the model includes earth fault protection as part of its product features, enabling detection of ground faults and helping prevent equipment damage and safety risks in automation panels. For best results, coordinate with upstream protection settings and ensure proper enclosure for accurate fault sensing.
Certification details are provided by Eaton and can vary by region. Typical considerations include CE compliance and recognized safety standards, along with enclosure IP ratings where applicable. Always refer to the Eaton specification sheet for the NZMH3-AE400-T-S1 to confirm the exact certifications relevant to your locale.
Warranty coverage follows Eaton’s policy: one year from installation or eighteen months from shipment, whichever occurs first. For maintenance, rely on standard fault-tripping diagnostics, periodic inspection of terminals (front-screw connections), and timely replacement of worn accessories like rocker levers or motors when recommended by Eaton.