Eaton NZMB1-S63-CNA Molded Case Circuit Breaker - Magnetic
Part Number: NZMB1-S63-CNA
Quick Summary
NZMB1-S63-CNA molded case circuit breaker protects electrical systems in industrial machinery and panel boards. In fast-paced control environments, nuisance trips and slow fault isolation can disrupt production; magnetic-only trip offers rapid fault clearance with fewer false trips. Compliance and reliability are supported by the NZM1 frame and a three-pole design with a 25 kAIC short-circuit rating, while 63 A at 480 Vac suits motor loads and panelboard protection. This solution integrates smoothly with Eaton’s NZM1 family, delivering a compact footprint and predictable maintenance, making it a practical choice for industrial protection devices and motor control centers.
Product Information
Extended Description
NZMB1-S63-CNA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM1-frame, NZMB1, Magnetic only trip, 640-1120A, Three-pole, 63A, 480 Vac, 25 kAIC, Motor protection without overload release, Magnetic switch off, 22 kW at 230 Vac, 45 kW at 400 Vac
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB1-S63-CNA
EAN
4015082812652
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
Special features
Magnetic switch off
Amperage Rating
63 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
22 kW at 230 Vac 45 kW at 400 Vac
Number of poles
Three-pole
Trip rating
640-1120 A
Magnetic only trip for rapid fault clearance → Reduces downtime and improves line availability in crane, conveyor, and machine control applications. The three-pole NZMB1-S63-CNA fits the NZM1 frame family, ensuring seamless panel integration and standardization across devices in MCCs and control panels. 63 A at 480 Vac → Supports typical motor starter and load feeder circuits with predictable coordination with upstream protection. Short-circuit rating of 25 kAIC → Enhances fault tolerance in moderate to high fault environments, reducing the risk of equipment damage and downstream trip cascades. Motor protection without overload release → Simplifies protection scheme for controlled starts and stops, lowering nuisance trips while preserving essential motor protection for startup surges. Compact dimensions (2.68 in depth, 5.71 in height, 3.54 in width) and a 3 lb weight → Streamlines panel layout, easing installation and service access in dense electrical rooms. Warranty and service terms (one year from install or 18 months from shipment) provide predictable aftersales support and risk mitigation for project ROI.
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FAQs
NZMB1-S63-CNA is designed for the NZM1 frame and three-pole configuration, ensuring straightforward integration into Eaton panelboards and MCCs. With a compact footprint (3.54 in W x 5.71 in H x 2.68 in D) and a product weight of 3 lb, it fits standard DIN rail or enclosure mounting practices typical for 480 Vac motor circuits.
The unit provides a 63 A rating at 480 Vac, with a magnetic-only trip mechanism and a short-circuit breaking capacity of 25 kAIC. It is designed for motor protection without overload release, delivering rapid fault isolation while avoiding nuisance trips in appropriate loads.
Yes. The three-pole NZMB1-S63-CNA, built on the NZM1 frame, supports motor circuits up to 63 A at 480 Vac and offers magnetic trip protection tailored for motor start/stop events. It complements MCCs and machine controls where controlled isolation and fast fault clearing are critical for uptime.
Compliance details are provided by the manufacturer; the data sheet notes 'Compliances: Contact Manufacturer' for specific certifications. The product carries a robust protection profile, including a 25 kAIC short-circuit rating and Eaton’s standard warranty terms, with documentation available on request.
Warranty terms specify one year from installation or eighteen months from shipment, whichever occurs first. Because this is a magnetic-only trip device with a straightforward protection scheme, maintenance typically centers on routine inspection and panel wiring checks, supporting stable protection performance and favorable total cost of ownership.