Eaton NZMB2-A63-BT-NA Molded Case Breaker - 25 kAIC
Part Number: NZMB2-A63-BT-NA
Quick Summary
Eaton NZMB2-A63-BT-NA molded case breaker is designed to protect and control power in industrial and commercial panels. It provides reliable overcurrent protection with a three-pole NZM2 frame and adjustable trip to suit varying load conditions. Engineers struggle to balance fast fault clearing with selective coordination; this device offers 50-63 A OL protection and a 25 kAIC interrupt rating for critical feeders. Note that formal CE, SIL, or IP ratings are not listed in the data and certification status should be confirmed with the manufacturer. The compact front-frame clamp simplifies installation and maintenance, while compatibility with rocker lever and motor-drive accessories expands control options. In short, it delivers robust protection, a compact footprint, and a dependable path to uptime and efficiency in manufacturing and process lines.
Product Information
Extended Description
NZMB2-A63-BT-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMB2, Fixed thermal, adj. magnetic trip, 300-500A, Three-pole, 63A, 440 Vac, 25 kAIC, Box, Distribution circuit protect., 50-63A, Front frame clamp, 50-63A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB2-A63-BT-NA
EAN
4015081074259
Product Length/Depth
4.05 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
63 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
380-630A delayed
Setting Range Ol Protector
50-63A
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Front frame clamp
Overload range
50-63A
Number of poles
Three-pole
Trip rating
300-500 A
Power Xpert Protection Manager x64
Compact circuit-breakers and switch-disconnectors up to 1600 A
Eaton Specification Sheet - NZMB2-A63-BT-NA
Intelligent power starts with accurate, actionable data
The NZM2 frame and three-pole configuration provide a standardized protection platform across panel enclosures, delivering consistent trip characteristics and predictable behavior under fault conditions. This consistency reduces commissioning time, improves spare parts planning, and minimizes panel complexity, enabling faster maintenance and fewer mis-wiring errors. It is well suited for industrial feeders, machine control panels, and commercial electrical rooms where reliable three-phase protection is required. Feature: 50-63 A overload (OL) protection with an adjustable magnetic trip (T185). Business Impact: tailoring protection to motor loads and varying process feeders lowers nuisance tripping while preserving fast fault clearance. Application: retrofit projects or new installations where load profiles change over time, ensuring selective coordination with upstream devices. Feature: 25 kAIC short-circuit breaking capacity. Business Impact: provides margin for high fault currents, increasing equipment safety and downstream protection. Application: feeders and machine circuits in manufacturing facilities that may experience large fault currents. Feature: Front frame clamp terminals. Business Impact: simplifies wiring and maintenance with front-access connections, enabling faster panel work and safer downtime, especially in crowded switchgear. Application: retrofit projects and new installations in compact panels. Feature: Rocker lever and motor-drive accessories. Business Impact: expands control options, supports motor starting schemes, and reduces the need for separate components. Application: machine control panels and process lines requiring integrated operator interface capabilities. Feature: Compact footprint and weight (4.05 in depth, 7.24 in height, 4.13 in width, 5.17 lb). Business Impact: saves enclosure space, lowers shipping and installation costs, and simplifies device substitution during upgrades. Application: OEM equipment fit-outs and space-constrained distribution boards. Added value: Warranty and service terms protect investment; Eaton's policy offers one year from installation or eighteen months from shipment, whichever comes first, helping procurement plan for routine maintenance and asset lifecycle.
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FAQs
The NZMB2-A63-BT-NA uses a front frame clamp terminal design on the NZM2 frame, enabling straightforward front-access wiring and panel mounting. Its three-pole format supports standard three-phase distribution, and the compact dimensions help with space-constrained enclosures. This combination reduces installation time and simplifies future upgrades while maintaining reliable protection.
Key specs include a 63 A amperage rating, 440 Vac rating, and a 25 kAIC short-circuit breaking capacity. The device features a 50-63 A overload protection range with an adjustable magnetic trip (T185). It is designed for three-pole operation on an NZM2 frame, suitable for demanding industrial feeders and machine circuits.
Yes. With adjustable OL protection, a high 25 kAIC capacity, and compatibility with motor-drive accessories, this breaker supports motor protection schemes in manufacturing lines. Its rugged build and front-access terminals simplify integration into motor control panels and machine bundles while maintaining safe startup and shutdown sequencing.
The data specifies Compliances as 'Contact Manufacturer,' indicating that region-specific certifications (such as CE) should be confirmed with Eaton to meet local regulatory requirements. For projects requiring formal certification, verify with Eaton during procurement and review any region-specific documentation before installation.
The product carries Eaton’s warranty policy of one year from the date of installation or eighteen months from shipment, whichever comes first. This helps engineering and procurement teams budget for preventive maintenance, plan part replacement cycles, and manage asset lifecycle with greater confidence.