Eaton NZMB2-S100-BT-CNA Molded Case Circuit Breaker - Magnetic Only 25 kAIC
Part Number: NZMB2-S100-BT-CNA
Quick Summary
The Eaton NZMB2-S100-BT-CNA molded case circuit breaker protects motor circuits in industrial control panels. This device delivers reliable magnetic-only protection in a compact, front-frame-mounted package. Engineers often face the trade-off between fast protective action and ease of installation in crowded control panels; this unit addresses that by combining a three-pole NZMB2 frame with box terminals and front-frame clamp. Compliance details should be confirmed with Eaton in your region; the datasheet confirms a 25 kAIC short-circuit rating and a 440 Vac rating, with an adjustable 800–1400 A delayed trip range for starter circuits. In practice, this translates to reduced panel size, lower wiring costs, and faster commissioning for motor-driven equipment.
Product Information
Extended Description
NZMB2-S100-BT-CNA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMB2, Magnetic only trip, Three-pole, 100A, 440 Vac, 25 kAIC, Box, Motor protection without overload release, 800-1400A delayed, Front frame clamp
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB2-S100-BT-CNA
EAN
4015081073290
Product Length/Depth
0.01 in
Product Height
7.24 in
Product Width
4.13 in
Product Weight
5.17 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
100 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
800-1400A delayed
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Front frame clamp
Number of poles
Three-pole
Compact circuit-breakers and switch-disconnectors up to 1600 A
Eaton Specification Sheet - NZMB2-S100-BT-CNA
Feature magnetic-only trip → Business Impact faster protection reduces arc flash risk and motor damage; Application motor feeders in compact panels. The magnetic trip enables rapid interrupting action for high inrush motor starts, improving uptime and safety. Feature 100 A rating → Business Impact suitable for common motor loads; Application panel feeders and equipment feeders. The 100 A capability aligns with standard industrial motors, enabling scalable protection without over-sizing. Feature 440 Vac rating → Business Impact supports widespread European, Asian, and U.S. grid voltages; Application control panels and motor drives in multi-voltage environments. Feature NZMB2 frame with front frame clamp and box terminals → Business Impact simplifies installation and maintenance; Application plug-and-play mounting in enclosure walls and switchgear racks. Feature Accessories rocker lever and motor drive → Business Impact enhances operability and control during commissioning; Application straightforward operation in manufacturing lines. Warranty information supports predictable ownership costs and service planning in line with Eaton’s policy, aiding long-term budgeting and total cost of ownership.
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FAQs
Install in a panel that accommodates the NZM2 frame using the front frame clamp. Wire to the box terminals with appropriate conductor gauge for 100 A ratings, and consider adding the rocker lever or motor drive accessory for easier manual operation and remote control integration.
Key specs include a 100 A amperage rating, 440 Vac voltage rating, and a 25 kAIC short-circuit breaking capacity with a magnetic-only trip. It is a three-pole device in the NZMB2 frame, designed for motor protection without overload release.
Yes, it is designed for motor feeders and similar loads requiring fast magnetic protection. Note that it provides magnetic protection without overload release; for integrated protection, pair it with additional motor protection devices as needed.
Compliances are listed as 'Contact Manufacturer'—regional regulatory approvals (such as CE or other certifications) should be verified directly with Eaton to confirm current approvals for your market and application.
The magnetic-only trip and compact front-frame design reduce panel footprint and wiring complexity, lowering installation time and maintenance costs. Fast breaker response minimizes downtime, while standardization across panels simplifies spare parts and training, contributing to a lower total cost of ownership.