Eaton NZMB2-S160-CNA NZM Circuit Breaker - Magnetic Trip
Part Number: NZMB2-S160-CNA
Quick Summary
NZMB2-S160-CNA is a three-pole molded case circuit breaker designed to protect motors and control circuits in industrial power distributions. It addresses the challenge of delivering reliable protection in compact panels without complicating wiring. While the product datasheet lists general compliances, users should confirm regional safety certifications with Eaton to ensure local regulatory alignment; typical protection in this family aligns with CE/IEC-based standards and region-specific approvals. In addition to its motor-protection‑without-overload release capability, the NZMB2-S160-CNA integrates with rocker-lever accessories and motor drives for streamlined commissioning. This solution reduces downtime, simplifies panel wiring, and supports scalable protection across evolving motor control applications in manufacturing and processing plants.
Product Information
Extended Description
NZMB2-S160-CNA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMB2, Magnetic only trip, 504-882A delayed, Three-pole, 63A, 440 Vac, 25 kAIC, Motor protection without overload release, Screw, 18.5 kW at 230 Vac, 30 kW at 400 Vac
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB2-S160-CNA
EAN
4015082692490
Product Length/Depth
5.9 in
Product Height
7.7 in
Product Width
4.1 in
Product Weight
4.1 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
63 A
Voltage rating
440 Vac
Trip Type
Magnetic only
Circuit breaker type
NZMB2
Frame
NZM2
Class
Motor protection without overload release
Accessories
Rocker lever, motor drive
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Screw
Rated operational current
30 kW at 400 Vac 18.5 kW at 230 Vac
Number of poles
Three-pole
Trip rating
504-882 A delayed
Feature Magnetic trip with 25 kAIC rating → Business impact Faster fault isolation reduces equipment damage and downtime; Application motor control centers and panel boards. Feature Three-pole, 63 A rating at 440 Vac → Business impact Optimized for three‑phase motors with standard distribution voltages, enabling reliable protection with minimal wiring changes; Application conveyor systems, fans, and pumps. Feature NZMB2 frame within NZM2 family → Business impact Easy integration with existing Eaton components and consistent replacement parts; Application retrofits and new installations in engineered motor control panels. Feature Motor protection without overload release → Business impact Targeted motor protection without nuisance tripping, improving motor life and plant uptime; Application starting circuits and driven loads where overload release is not required. Feature Short-circuit breaking capacity of 25 kAIC → Business impact Enhanced fault tolerance in moderate to high fault environments; Application service feeders and machine sections with potential short circuits. Feature Screw connection and available rocker lever, motor drive accessories → Business impact Simplified assembly, secure terminations, and flexible control options; Application field serviceability and quick upgrades in evolving machinery. Feature Compact dimensions (5.9 in x 7.7 in x 4.1 in) and 4.1 lb weight → Business impact Space-efficient protection in tight electrical cabinets, reducing enclosure size and material costs; Application compact control panels and retrofit projects. Feature 63 A continual operating current with 504-882 A delayed trip → Business impact Precise coordination with motor starting curves and protective timing, reducing nuisance trips; Application motor start-up sequences and load-shedding schemes in industrial lines. Feature Warranty alignment to Eaton policy → Business impact Clear coverage terms supporting maintenance planning and total cost of ownership; Application service agreements and long-term reliability strategies for electrical protection.
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FAQs
The NZMB2-S160-CNA uses screw terminals for secure wiring and a three-pole configuration compatible with the NZM2 frame. Plan for 440 Vac supply and 63 A load. Ensure panel space accommodates its 5.9 in length, 7.7 in height, and 4.1 in width. Use the rocker lever or motor drive accessories to facilitate control wiring and motor-start integration, then torque connections to Eaton’s recommended specs to maintain reliability.
This device is rated 63 A and 440 Vac with a magnetic-only trip. It provides a short-circuit breaking capacity of 25 kAIC and offers a delayed trip range of 504–882 A, enabling coordination with motor starting and fault conditions. It is designed for motor protection without overload release, which is ideal for controlled start/stop sequences in driven loads.
Yes. The three-pole design and 440 Vac rating align with typical three-phase motor circuits found in industrial panels. Its NZM2 frame ensures compatibility with other NZM components, and the screw terminals simplify panel wiring. For motors with specific inrush or protection requirements, coordinate with motor drive accessories to optimize protection and startup performance.
Compliances are listed as governed by the manufacturer, so verify applicable certifications with Eaton for your region. In practical terms, many customers seek CE marking, IEC 60947-2 compliance, and UL/CSA where applicable. Always confirm current certifications and any region-specific labeling before ordering or commissioning to ensure regulatory alignment.
The device’s compact size, straightforward screw termination, and motor-protection‑without-overload release reduce wiring complexity and nuisance trips, lowering maintenance time and downtime. The 25 kAIC fault tolerance and magnetic-only trip deliver reliable protection for motor circuits, helping extend motor life and reduce unplanned outages, which translates into lower total cost of ownership over the life of the panel.