Eaton NZMB2-AF45-BT-NA NZMB2 Molded Case Circuit Breaker - 25 kAIC
Part Number: NZMB2-AF45-BT-NA
Quick Summary
NZMB2-AF45-BT-NA molded case circuit breaker protects electrical distribution in industrial controls. Many engineers struggle with nuisance trips and selecting protection that matches dynamic panel loads. Certification coverage and safety approvals (SIL, CE, IP ratings) are documented in Eaton's datasheet and should be verified for your region. With fixed thermal and adjustable magnetic trip in a three-pole NZMB2 device, it delivers reliable protection, easier coordination, and faster maintenance in compact panels. Its front-frame clamp and NZM2 frame compatibility simplify installation across distributed control panels, reducing wiring time and potential errors. This combination supports improved uptime and lower total cost of ownership for industrial facilities.
Product Information
Extended Description
NZMB2-AF45-BT-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMB2, Fixed thermal, adjustable magnetic trip, Three-pole, 45A, 440 Vac, 25 kAIC, Box, Distribution circuit protection, 45-45A, 300-500A delayed, Front frame clamp, 45-45A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB2-AF45-BT-NA
EAN
4015081072835
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
45 A
Voltage rating
440 Vac
Trip Type
T185
Circuit breaker type
NZMB2
Terminals
Box
Frame
NZM2
Class
Distribution circuit protection
Accessories
Rocker lever, motor drive
Adjustment range short-circuit release
300-500A delayed
Setting Range Ol Protector
45-45A
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Front frame clamp
Overload range
45-45A
Number of poles
Three-pole
Feature: Three-pole 45 A rating with 440 Vac operation and a 25 kAIC interrupt capacity. Business Impact: Provides robust short-circuit protection for distribution circuits, enabling safer energy interruption and reduced panel downtime. Application: Suitable for distribution panels and motor control centers in industrial automation. Feature: Fixed thermal with adjustable magnetic trip (300-500 A delayed). Business Impact: Enables precise protection coordination, minimizing nuisance trips while accommodating inrush and fault conditions. Application: Feeder and MCC protection in automated manufacturing lines. Feature: NZMB2 frame with NZM2 compatibility and front frame clamp. Business Impact: Streamlines installation, allows flexible mounting, and simplifies wiring in compact control cabinets. Application: New panel builds and retrofits in existing NZM2-based infrastructures. Feature: Box terminals and available accessories (rocker lever, motor drive). Business Impact: Improves wiring reliability and enables easy automation integration with motor control options. Application: Field upgrades and plug-in accessory configurations in distribution circuitry. Feature: Short-circuit and interrupt ratings at 25 kAIC. Business Impact: Supports high fault current environments, ensuring fast isolation and reduced equipment damage. Application: Heavy-duty industrial environments with higher fault currents. Feature: Warranty policy (one year from installation or 18 months from shipment). Business Impact: Provides OEM-backed support and minimizes risk during deployment. Application: Procurement and service planning for critical infrastructure projects.
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FAQs
NZMB2-AF45-BT-NA is a three-pole device designed for the NZM2 frame with front frame clamp and box terminals. It is compatible with standard distribution panels and motor control centers that support NZM2 frames. When planning installation, verify panel depth (4.05 in), width (4.13 in), and height (7.24 in) to ensure proper clearance and wiring space, and consider rocker lever or motor drive accessories for enhanced operation.
Key specs include an Amperage rating of 45 A, a voltage rating of 440 Vac, and a Short-circuit breaking/Interrupt rating of 25 kAIC. It is a three-pole NZMB2 type with a fixed thermal and adjustable magnetic trip (300-500 A delayed), and terminals configured for front frame clamp with box connections.
Yes. The NZMB2-AF45-BT-NA is designed for distribution circuit protection within industrial control panels, including motor control centers. Its NZM2 frame compatibility, 25 kAIC interruption rating, and adjustable trip range support reliable protection coordination, helping to safeguard equipment and maintain process uptime.
Compliance details are provided by Eaton; the product datasheet notes ‘Compliances: Contact Manufacturer.’ For regional approvals such as CE or UL, consult Eaton’s Specification Sheet and confirm Listings applicable to your installation location and industry requirements.
Warranty covers one year from installation or eighteen months from shipment. The device's robust 25 kAIC interrupt rating, along with easy front-frame mounting and available accessories, supports reduced downtime, simpler maintenance, and lower total cost of ownership in high-demand industrial environments.