Eaton NZMB2-S160 Molded Case Breaker - 25 kAIC Mag Trip
Part Number: NZMB2-S160
Quick Summary
Eaton NZMB2-S160 is a molded case circuit breaker providing magnetic‑only protection for three‑phase motor circuits. This design helps reduce nuisance trips that plague frequent starts and high-inrush loads in industrial panels. Compliances are defined by the manufacturer; typical certifications to verify include CE marking, UL/CSA listings, and IEC motor protection standards—confirm with Eaton for your region. The device is built for robust motor protection in compact spaces, supporting quick installation and reliable protection in automation panels, with media-friendly screw termination and a 160 A rating suitable for medium‑sized motor feeders.
Product Information
Extended Description
NZMB2-S160 Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMB2, Magnetic only trip, 1280-2240A delayed, Three-pole, 160A, 600 Vac, 25 kAIC, Motor protection without overload release, Screw, 45 kW at 230 Vac, 90 kW at 400 Vac
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB2-S160
EAN
4015082657376
Product Length/Depth
5.9 in
Product Height
7.2 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
160 A
Voltage rating
600 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
45 kW at 230 Vac 90 kW at 400 Vac
Number of poles
Three-pole
Trip rating
1280-2240 A delayed
Feature: Magnetic-only trip for motors → Business impact: Reduces nuisance trips during motor starts and surges → Application: 3‑pole motor feeders in control panels; Feature: 160 A at 600 Vac → Business impact: Aligns with standard motor circuit feeders while maintaining headroom for startup peaks → Application: Industrial motor circuits and power distribution; Feature: 25 kAIC short-circuit rating → Business impact: Higher fault interruption capability reduces equipment damage and downtime → Application: Protection in high-energy industrial environments; Feature: NZM2 frame and NZMB2 type → Business impact: Streamlined compatibility with existing NZM2 installations and global Eaton accessories → Application: Retrofit projects and new builds in OEM panels; Feature: Screw connection and motor drive accessories → Business impact: Faster, more reliable installation with simple wiring and field adjustments → Application: Panel builders and maintenance teams; Feature: 1280-2240 A delayed trip and three-pole design → Business impact: Controlled protection for motor starters during transient faults and startup sequences → Application: Industrial motor control centers and automation systems.
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FAQs
NZMB2-S160 uses screw terminals and a three-pole NZM2 frame design, making it compatible with standard motor feeders and control panels. It pairs with rocker lever and motor drive accessories for quick field adjustments. Ensure enclosure space fits the 4.1 in x 7.2 in x 5.9 in footprint and follow manufacturer mounting guidelines.
Key specs include a 160 A amperage rating, 600 Vac voltage rating, 25 kAIC short-circuit breaking capacity, 3-pole configuration, and a magnetic-only trip. The product supports a delayed trip range of 1280–2240 A and the NZMB2 frame, with screw termination for reliable wiring.
Yes. The device is specifically listed as Motor protection without overload release, indicated by the NZMB2 class. This makes it ideal for motor feeders where overload protection is provided by separate devices or control logic, while the breaker handles instantaneous fault protection via magnetic trip.
The product carries Eaton’s warranty policy: one year from installation or eighteen months from shipment, whichever occurs first. For service, replacement parts, and region-specific support, contact Eaton or your authorized distributor for guidance.
The official Eaton specification sheet for NZMB2-S160 is available on Eaton’s site at the provided URL. The datasheet includes full electrical ratings, installation notes, and accessory details to assist with design and procurement.