NZMB1-4-A80 Molded Case Circuit Breaker - 25 kAIC
Part Number: NZMB1-4-A80
Quick Summary
NZMB1-4-A80 is a molded case circuit breaker designed for reliable overcurrent protection in industrial distribution panels. Engineers often grapple with nuisance trips and space constraints when upgrading legacy protection schemes. While the specific regulatory certifications should be confirmed with Eaton, NZM family designs commonly align with IEC/UL standards for 440 Vac systems. For reliability and ease of maintenance, this unit features a thermal-magnetic trip, rocker lever, front-frame clamp, and a 25 kAIC interrupt rating for 480-800 A. Designed for distribution circuit protection, the NZMB1-4-A80 offers front-access installation and compatibility with the NZM1 frame family, enabling fast commissioning.
Product Information
Extended Description
NZMB1-4-A80 Eaton: Eaton Series NZM complete molded case circuit breaker, NZM1-frame, NZMB1, Thermal-magnetic trip type, 480-800A trip rating, Four-pole, 80A, 440 Vac, 25 kAIC, Distribution circuit protection, Rocker lever, 63-80A, Front frame clamp, 63-80A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB1-4-A80
EAN
4015082658052
Product Length/Depth
2.68 in
Product Height
5.71 in
Product Width
3.54 in
Product Weight
3 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
80 A
Voltage rating
440 Vac
Trip Type
T268
Circuit breaker type
NZMB1
Frame
NZM1
Class
Distribution circuit protection
Accessories
Rocker lever
Setting Range Ol Protector
63-80A
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Front frame clamp
Overload range
63-80A
Number of poles
Four-pole
Trip rating
480-800 A
The NZMB1-4-A80 delivers 80 A protection at 440 Vac, with a thermal-magnetic trip type that quickly clears faults while minimizing nuisance trips in demanding environments. Business impact: enhanced feeder protection and reduced downtime, which translates to lower maintenance costs and improved plant availability. Application: suitable for 3-phase industrial distribution panels where compact footprint and reliable fault clearing are required. The four-pole configuration ensures balanced phase protection for motor feeders and downstream equipment, improving coordination and safety in harsh manufacturing environments. The 25 kAIC short-circuit rating provides resilience against high fault currents, supporting installation in facilities with significant fault potential. Front-frame clamp mounting and a rocker lever simplify mounting and operation, accelerating commissioning and field service. Compatibility with the NZM1 frame family enables scalable protection across multiple panel designs, reducing spare parts inventory and training needs. The 63-80 A setting range allows tailored protection to match load profiles, improving selectivity and reducing undesired disconnections. Overall, this breaker offers a robust, install-ready solution that supports lifecycle cost reductions and predictable performance in distribution circuits.
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FAQs
The NZMB1-4-A80 is designed for front-frame clamp mounting, allowing straightforward retrofit into compatible EN/IEC panels. Ensure the panel supports four-pole NZM1 frame devices and verify space for a 3.54 in width, 5.71 in height, and 2.68 in depth footprint. The rocker lever aids tool-free operation, while the four-pole configuration supports balanced three-phase protection. Confirm panel clearance and terminal torque per the panel manufacturer’s guidelines.
Trip type T268 denotes a thermal-magnetic trip characteristic that combines instantaneous magnetic tripping with thermal overload protection. This provides selective protection for gradual overloads and rapid fault clearance on high-energy circuits. For the NZMB1-4-A80, this means reliable protection for 480-800 A fault scenarios in a 440 Vac three-phase system, helping prevent damage to feeders and motors.
Yes. With a 440 Vac rating and four-pole design, NZMB1-4-A80 is well-suited for 3-phase motor feeders in industrial panels. The 25 kAIC short-circuit rating supports robust fault handling, while the NZM1 frame compatibility ensures integration with existing motor control and protection schemes. Verify coordination with upstream protection to ensure selective tripping and minimized downtime.
Compliances are listed as 'Contact Manufacturer' for this model. In practice, NZM series breakers typically reference IEC/UL standards for industrial protection. To confirm required certifications for your region or application (for example CE, UL, or CSA), contact Eaton directly or your local distributor to obtain the current certification documentation and any region-specific conformance statements.
The unit provides a one-year warranty from installation or eighteen months from shipment, whichever occurs first, per Eaton policy. ROI benefits come from higher fault tolerance (25 kAIC), reduced nuisance trips, and easier field maintenance thanks to a rocker lever and front-frame mounting. Planning for spares and leveraging NZM1-frame compatibility helps minimize downtime and streamline service across panels.