Eaton NZMB2-A25-BT-NA Molded Case Circuit Breaker - 25 kAIC
Part Number: NZMB2-A25-BT-NA
Quick Summary
Eaton NZMB2-A25-BT-NA molded case circuit breaker provides reliable overload and short-circuit protection for distribution panels. Engineers often struggle to balance precise protection with compact form factors in harsh industrial environments. In the NZMB2 family, key features support CE-style compliance, IP-rated enclosures, and SIL safety considerations for safer, more reliable installs. By combining adjustable overload settings with a robust 25 kAIC interrupt rating, the unit helps minimize unplanned downtime while simplifying maintenance and spare-part planning. This makes it a strong choice for mid to high power distribution and motor-control applications where reliability matters.
Product Information
Extended Description
NZMB2-A25-BT-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMB2, Fixed thermal, adj. magnetic trip, 480-800A, Three-pole, 25A, 440 Vac, 25 kAIC, Box, Distribution circuit protect., 20-25A, Front frame clamp, 20-25A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB2-A25-BT-NA
EAN
4015081074211
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
25 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
350-350A delayed
Setting Range Ol Protector
20-25A
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Front frame clamp
Overload range
20-25A
Number of poles
Three-pole
Trip rating
480-800 A
Power Xpert Protection Manager x64
Eaton Specification Sheet - NZMB2-A25-BT-NA
Intelligent power starts with accurate, actionable data
Feature: Fixed thermal, adjustable magnetic trip (T185) on the NZMB2 frame. Business Impact: Delivers targeted overload protection and fast fault clearing, reducing arc flash exposure and equipment damage. Application: Ideal for 3-phase distribution panels and motor-control applications in medium to large industrial facilities.Feature: Amperage rating of 25 A with setting range 20-25 A. Business Impact: Enables precise overload protection for motors and control circuits, minimizing nuisance trips and extending motor life. Application: Fits circuits needing tight protection during start-up and steady-state operation in 440 Vac systems.Feature: Short-circuit breaking capacity and interrupt rating of 25 kAIC. Business Impact: High fault current capability reduces downstream damage and supports safer maintenance windows. Application: Suitable for distribution feeders and MCCs in demanding manufacturing environments.Feature: Three-pole configuration with front frame clamp terminals. Business Impact: Simplifies installation and service, delivering faster commissioning and easier field adjustments. Application: optimizes integration in three-phase power networks and retrofit panel updates.Feature: Accessories including rocker lever and motor drive option. Business Impact: Improves manual control and motor-drive compatibility, reducing commissioning time and enhancing operational flexibility. Application: Valuable in automated lines and control panels requiring quick, reliable adjustments.Feature: Robust warranty and documentation from Eaton. Business Impact: Provides clear coverage and ready access to specifications, datasheets, and configuration guidance, lowering risk and lifecycle costs. Application: Suitable for ongoing maintenance planning and spare-part provisioning across multiple sites.
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FAQs
NZMB2-A25-BT-NA uses front frame clamp terminals and box-type connections, enabling straightforward panel mounting and secure wiring. The front-access design eases installation within tight enclosures and simplifies field testing. Optional accessories such as a rocker lever and motor drive improve operating ergonomics and upgrade path for retrofit projects.
Key specs include a 25 A amperage rating, 440 Vac operating voltage, 25 kAIC interrupt capacity, and a three-pole configuration with a T185 trip type. The device offers an overload setting range of 20-25 A and a short-circuit release rated at 350 A delayed, supporting controlled fault clearance in typical industrial protection schemes.
Yes. Its three-pole design, high interrupt capacity, and adjustable overload protection make it well suited for motor control centers and distribution panels. The NZMB2 frame provides robust mechanical compatibility, while front-frame mounting and compatible accessories streamline installation, commissioning, and maintenance in automated manufacturing and process plants.
Documentation includes the Eaton Specification Sheet NZMB2-A25-BT-NA, plus white papers and performance data. The downloads section also lists Power Xpert Protection Manager x64 and related application notes. Compliances are coordinated with the manufacturer, so confirm exact standards and certifications with Eaton for your regional requirements.
Warranty follows Eaton policy: one year from installation or eighteen months from shipment, whichever occurs first. This provides assurance while reducing lifecycle risk. Maintenance impact is minimized through reliable trip performance, standard front-frame mounting, and available accessories, which shorten commissioning time and simplify spare-part planning in mixed-use industrial environments.