Eaton NZMB2-S5-BT-CNA Moulded Case Breaker - 25 kAIC
Part Number: NZMB2-S5-BT-CNA
Quick Summary
NZMB2-S5-BT-CNA is a molded case circuit breaker designed for motor protection in industrial drive applications. The device offers magnetic-only tripping with three poles, a 5 A rating, and 440 Vac, delivering up to 25 kAIC fault capacity. Engineers often struggle with fitting protective devices in compact panels while ensuring proper coordination and quick maintenance. Note that official CE, SIL, or IP certifications are not listed—verify with Eaton before regulated deployments. This solution leverages front-frame mounting for fast installation and uses the NZM2 frame to ensure compatibility with Eaton’s motor-protection lineup. By combining rugged protection with easy operation, it supports reliable uptime and streamlined panel design.
Product Information
Extended Description
NZMB2-S5-BT-CNA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMB2, Magnetic only trip, Three-pole, 5A, 440 Vac, 25 kAIC, Box, Motor protection without overload release, Rocker lever, motor drive, 32-56A delayed, Front frame clamp
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB2-S5-BT-CNA
EAN
4015081073191
Product Length/Depth
4.05 in
Product Height
7.24 in
Product Width
4.13 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
5 A
Voltage rating
440 Vac
Trip Type
Magnetic only
Circuit breaker type
NZMB2
Terminals
Box
Frame
NZM2
Class
Motor protection without overload release
Accessories
Rocker lever, motor drive
Adjustment range short-circuit release
32-56A delayed
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Front frame clamp
Number of poles
Three-pole
Feature: Magnetic-only trip on a three-pole NZMB2 design delivers fast, phase-coordinated protection. Business Impact: Reduces nuisance trips during motor startup and simplifies protection coordination across motor circuits. Application: Ideal for motor drives and fans in manufacturing lines where inrush and startup transients are common. Feature: 5 A amperage rating with 440 Vac operation. Business Impact: Protects low-current motors without over-sizing the protective device, lowering energy waste and nuisance trips. Application: Small to mid-size motors in automated panels. Feature: 25 kAIC interrupt rating with 32-56 A delayed settings. Business Impact: Enhances fault tolerance for high-current events and allows tuning for motor startup profiles. Application: Pumps, conveyors, and processing equipment with notable inrush. Feature: Front frame clamp terminals. Business Impact: Streamlines installation and service access, reducing commissioning time. Application: Retrofit projects and new builds in tight panel spaces. Feature: Rocker lever and motor-drive accessories. Business Impact: Improves operator ergonomics and control integration in MCCs. Application: Control stations and drive-driven motor systems. Feature: NZM2 frame compatibility. Business Impact: Simplifies spare parts planning and system integration across Eaton’s motor protection family. Application: New installs or replacements in Eaton-powered automation environments.
Get a Quick Quote for a Eaton NZMB2-S5-BT-CNA
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton NZMB2-S5-BT-CNA?
Enquire Now
FAQs
Installation should follow the front-frame clamp mounting method on the NZM2 frame, ensuring solid panel fit and proper clearance for wiring. Verify tension on terminals and use the rocker lever for easy manual operation. Plan for 3-pole alignment and secure mounting to reduce vibration and nuisance trips during startup in motor control centers.
Yes. The unit is rated for 440 Vac and supports an adjustable delayed trip range of 32-56 A, enabling you to tailor startup and short-circuit response for motor drives. This helps prevent nuisance trips on inrush while maintaining robust protection for medium-duty motors in automated lines.
25 kAIC is the short-circuit current rating, indicating the maximum interrupt current the breaker can safely interrupt. In systems with fault currents approaching or exceeding this value, this rating helps prevent catastrophic device failure and supports safer upstream coordination with other protective devices.
The NZMB2-S5-BT-CNA includes a rocker lever and motor-drive compatibility, aiding quick manual control and easier integration with motor-drive systems. The front-frame clamp design also simplifies wiring, reduces installation time, and improves service access within compact control panels.
The official Eaton specification sheet for NZMB2-S5-BT-CNA is available on Eaton’s site (Eaton Specification Sheet - NZMB2-S5-BT-CNA). Certification details and standards are provided there; if not listed in the datasheet, contact Eaton to confirm CE, SIL, or IP ratings before regulated deployments.