Eaton NZMH4-AEF1000-NA Molded Case Breaker - 85 kAIC
Part Number: NZMH4-AEF1000-NA
Quick Summary
NZMH4-AEF1000-NA molded case circuit breaker protects electrical distribution panels in industrial plants. Engineers often face nuisance trips and insufficient interrupt capacity during startup surges. UL Listed protection with a 1000 A rating and 85 kAIC at 480 VAC ensures reliable, scalable performance for feeders and switchgear. The front-screw, bolt-on terminals enable quick, vibration-resistant installations in harsh environments, while the NZM4 frame supports standardized protection across multiple circuits. This device also accommodates motor drive accessories for integrated control. By combining robust protection with a streamlined installation footprint, it delivers improved uptime, reduced maintenance, and predictable lifecycle costs for industrial facilities.
Product Information
Extended Description
NZMH4-AEF1000-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM4-frame, NZMH4, Thermal-magnetic trip, Three-pole, 1000A, 690 Vac, 85 kAIC at 480 Vac, Bolt-on, Distribution circuit protect., 1000-1000A, Front screw, 1000-1000A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMH4-AEF1000-NA
EAN
4015082711184
Product Length/Depth
8.26 in
Product Height
8.14 in
Product Width
8.14 in
Product Weight
46 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
1000 A
Voltage rating
690 V AC
Trip Type
T268
Circuit breaker type
NZMH4
Terminals
Bolt-on
Frame
NZM4
Class
Distribution circuit protection
Accessories
Rocker lever, motor drive
Adjustment range short-circuit release
2000-12000A delayed
Setting Range Ol Protector
1000-1000A
Short-circuit breaking capacity
85 kAIC
Interrupt rating
85 kAIC at 480 Vac
Connection
Front screw
Overload range
1000-1000A
Number of poles
Three-pole
Feature: Thermal-magnetic trip (T268) provides precise protection against overloads and short circuits. Business Impact: Minimizes equipment damage and unplanned downtime, supporting safer, more reliable operations. Application: Protection of feeders and motors in distribution panels across manufacturing lines. Feature: 1000 A nominal current rating with 85 kAIC interrupt capacity at 480 VAC. Business Impact: Supports high fault-current scenarios and future expansion without replacing breakers. Application: Large power feeds and critical electrical distributions in process plants. Feature: NZMH4 three-pole design on the NZM4 frame with bolt-on / front screw terminals. Business Impact: Simplifies installation, maintenance, and retrofits in existing switchgear. Application: Panelboard and switchgear assemblies needing robust, field-access protection. Feature: Accessories including rocker lever and motor drive. Business Impact: Improves operator ergonomics and enables motor-control integration for simplified control architecture. Application: Motor-start protection with streamlined manual operation. Feature: UL Listed certification and documented warranty. Business Impact: Ensures regulatory compliance and risk mitigation, with vendor-backed support for installation and maintenance. Application: Procurement and QA workflows for American markets and regulated environments. Insight: The compact NZM4 frame and 8.26 in length pair well with space-constrained enclosures, while continuing compatibility with front-access installation practices and existing Eaton protection schemes across facilities.
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FAQs
Yes. The NZMH4-AEF1000-NA uses front screw terminals and a bolt-on connection design, compatible with standard panelboard layouts. Its NZM4 frame and three-pole configuration streamline retrofits, while the front-access design simplifies wiring and maintenance in tight spaces.
This unit supports an 85 kAIC interrupt capacity at 480 VAC and features a thermal-magnetic trip (T268). It is designed for quick, reliable response to overloads and short circuits, protecting feeders and downstream equipment in high-demand environments.
Ideal for industrial power distributions, manufacturing lines, and large feeders in process facilities. The three-pole design, 1000 A rating, and high interrupt capacity make it well-suited for critical distribution panels and motor protection schemes in facilities requiring robust fault protection and minimal downtime.
The NZMH4-AEF1000-NA is UL Listed, signaling conformity with recognized safety standards for North American electrical installations. This certification supports regulatory compliance in procurement, installation, and quality assurance workflows, reducing risk in regulated environments.
Eaton provides a one-year warranty from installation or 18 months from shipment (whichever occurs first). This, combined with reliable thermal-magnetic protection and long-term availability of replacement parts, lowers maintenance costs and improves return on investment through extended equipment life and reduced unscheduled downtime.