Eaton NZMN1-4-A80 Molded Case Circuit Breaker - UL Listed
Part Number: NZMN1-4-A80
Quick Summary
The Molded Case Circuit Breaker NZMN1-4-A80 from Eaton provides reliable overcurrent protection for three-phase distribution panels and industrial equipment. This solution is designed to address nuisance trips, equipment downtime, and complex wiring coordination in demanding environments. Built around the NZM1 frame and a four-pole configuration, it features a thermal-magnetic T268 trip and a high interrupt rating to safeguard critical loads. With 690 Vac and 500 Vdc ratings, it supports mixed-voltage applications in modern facilities. The UL Listed certification confirms compliance with recognized safety standards. For technicians seeking robust protection with straightforward installation, this device offers dependable distribution circuit protection, compatibility with NZM1 accessories, and easy maintenance in high-demand electrical systems.
Product Information
Extended Description
NZMN1-4-A80 Eaton: Eaton Series NZM complete molded case circuit breaker, NZM1-frame, NZMN1, Thermal-magnetic trip, 480-800A trip rating, Four-pole, 80A, 690 Vac, 500 Vdc, 50 kAIC, Distribution circuit protection, 63-80A, Front frame clamp, 63-80A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMN1-4-A80
EAN
4015082658175
Product Length/Depth
2.68 in
Product Height
5.71 in
Product Width
3.54 in
Product Weight
4.7 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
80 A
Voltage rating
690 Vac, 500 Vdc
Trip Type
T268
Circuit breaker type
NZMN1
Frame
NZM1
Class
Distribution circuit protection
Accessories
Rocker lever
Setting Range Ol Protector
63-80A
Short-circuit breaking capacity
50 kAIC
Interrupt rating
50 kAIC
Connection
Front frame clamp
Overload range
63-80A
Number of poles
Four-pole
Trip rating
480-800 A
Feature → Business Impact → Application: The NZMN1-4-A80 delivers an 80 A amperage rating and a 50 kAIC short-circuit interrupt capacity, enabling distribution feeders to withstand high fault currents while minimizing downtime in industrial plants. This translates to improved equipment availability and safer startup sequences for manufacturing lines. Application: grid-fed panel boards and machine control centers requiring reliable overload protection. Feature → Business Impact → Application: A thermal-magnetic T268 trip provides fast, predictable tripping under overloads and short circuits, reducing the risk of thermal damage and arc-flash exposure. This supports safer maintenance windows and longer asset life in production facilities. Application: critical motor feeders and process lines with high inrush currents. Feature → Business Impact → Application: Four-pole construction and front frame clamp enable single-operator installation in compact switchboards, cutting commissioning time and improving wiring integrity in panel assemblies. Application: new builds and retrofit projects where space and accessibility matter. Feature → Business Impact → Application: 690 Vac / 500 Vdc ratings allow mixed voltage protection, simplifying panel design and stocking since one MCCB family serves both AC and DC feeders. Application: mixed voltage distribution networks. Feature → Business Impact → Application: 63-80 A setting range (63-80A) supports selective coordination with downstream protective devices, improving reliability and reducing unnecessary trips. Application: staged protection in multi-tiered electrical systems. Feature → Business Impact → Application: Rocker lever accessory and a standardized NZM1 frame streamline ordering, stocking, and maintenance, lowering total cost of ownership. Application: serviceable in modular Eaton NZM1 panel systems and future expansions.
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FAQs
The NZMN1-4-A80 uses a front frame clamp connection, simplifying mounting in standard four-pole panels. Verify panel space, tighten terminal and frame clamps to manufacturer torque specifications, and verify alignment with busbar connections. The rocker lever accessory can speed testing and control during commissioning, reducing installation time and potential mis-wiring.
This device employs a thermal-magnetic T268 trip mechanism with an 80 A ampacity and a 50 kAIC short-circuit interruption rating. The setting range of 63-80 A supports selective coordination with downstream devices, ensuring only the protected circuit trips under fault conditions while minimizing outages elsewhere in the system.
Yes. The NZMN1-4-A80 is rated for 690 Vac and 500 Vdc, enabling protection for mixed voltage systems in industrial environments. When DC protection is required, ensure wiring polarity and conductor sizing meet applicable standards and that the device is installed in a compliant DC distribution panel.
The NZMN1-4-A80 is UL Listed, reinforcing compliance with recognized safety standards for industrial electrical protection. This designation supports safe integration into compliant equipment and panels, facilitating certification processes for the broader electrical installation.
With a four-pole design, front frame clamp, and standard accessories like the rocker lever, maintenance and field service are straightforward. The device’s durable thermal-magnetic trip minimizes nuisance trips, while its compatibility with the NZM1 family simplifies spare parts stocking and future expansion, delivering a lower total cost of ownership.