Eaton NZMB1-S80-CNA Molded Case Breaker - 25 kAIC
Part Number: NZMB1-S80-CNA
Quick Summary
NZMB1-S80-CNA molded case circuit breaker protects motor circuits and distribution panels in industrial applications. This magnetic-only device quickly isolates faults, reducing downtime and collateral damage in demanding environments. Engineers often struggle with nuisance trips, mis-coordination, and the need for compact protection within space-limited panels. The NZMB1-S80-CNA delivers a compact three-pole solution with a 25 kAIC short-circuit rating and magnetic trip to ensure fast, reliable disconnection without an overload relay. When selecting protection for motors, you gain simplicity with motor protection without overload release and the ability to coordinate with upstream devices. Compliance markings (CE, IP) should be confirmed with Eaton for this model to ensure regulatory alignment.
Product Information
Extended Description
NZMB1-S80-CNA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM1-frame, NZMB1, Magnetic only trip, 48-88A, Three-pole, 80A, 480 Vac, 25 kAIC, Motor protection without overload release, Magnetic switch off, 1.5 kW at 230 Vac, 3 kW at 400 Vac
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB1-S80-CNA
EAN
4015082812669
Product Length/Depth
2.68 in
Product Height
5.71 in
Product Width
3.54 in
Product Weight
2 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
Magnetic switch off
Amperage Rating
80 A
Voltage rating
480 Vac
Trip Type
Magnetic only
Circuit breaker type
NZMB1
Frame
NZM1
Class
Motor protection without overload release
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Rated operational current
1.5 kW at 230 Vac 3 kW at 400 Vac
Number of poles
Three-pole
Trip rating
48-88 A
Compact circuit-breakers and switch-disconnectors up to 1600 A
Eaton Specification Sheet - NZMB1-S80-CNA
Feature: 80 A amperage rating on a three-pole device for 480 Vac systems. Business Impact: Precise protection of motor circuits while maintaining panel density and reducing wiring complexity. Application: Suitable for machine control panels and power distribution within 480 Vac networks. This supports long-term reliability and predictable performance in automated lines. Feature: 25 kAIC short-circuit breaking capacity. Business Impact: High fault withstand minimizes equipment damage and arc flash exposure, enabling safer startup and maintenance procedures. Application: Ideal for applications with higher fault currents, such as conveyors and presses. Feature: Magnetic-only trip with no overload release. Business Impact: Fast, clean disconnections without nuisance thermal tripping, lowering unplanned downtime and maintenance costs. Application: Motor protection in lines requiring external overload relays for full thermal coordination. Feature: NZM1 frame, NZMB1 type, three-pole construction. Business Impact: Simplifies retrofits and upgrades by ensuring compatibility with existing NZM1-based panels and components. Application: Panel modernization projects and new machinery installations. Feature: Compact footprint and weight of 2 lb. Business Impact: Easier installation in restricted spaces and reduced panel modification time, speeding commissioning. Application: Environments with tight enclosure budgets, compact control cabinets, and modular machine builds. Feature: Magnetic switch off capability. Business Impact: Safe shutdown capability supports maintenance and servicing with clear display of de-energized circuits. Application: Factory floor maintenance and service turnarounds. Warranty: Eaton 25-000 policy provides one year from installation or 18 months from shipment, adding procurement value and risk mitigation.
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FAQs
Install the three-pole NZMB1-S80-CNA on the NZM1 frame in a suitable panel enclosure. Ensure wiring follows the 480 Vac rating, with correct phasing for three-phase circuits. Verify the device is secured, and use external overload protection if coordinated protection is required for the motor and drive assembly.
Key specs include 80 A amperage rating, 480 Vac voltage rating, 25 kAIC short-circuit breaking capacity, three poles, and magnetic-only trip. It provides motor protection without an intrinsic overload release, so an external overload relay may be used for thermal coordination.
Yes. It is designed for motor protection in three-phase circuits up to 80 A with magnetic trip, enabling fast fault isolation. For complete motor protection, pair it with an appropriate overload relay and follow standard protection coordination practices.
Compliances should be confirmed with the manufacturer for this specific model. The device uses standard NZM1 frame compatibility, which supports straightforward retrofits and panel upgrades, provided the panel accommodates 480 Vac protection and the associated mounting footprint.
Warranty follows Eaton’s policy 25-000: one year from installation or 18 months from shipment, whichever comes first, offering protection against manufacturing defects and supporting maintenance planning for uptime.