Eaton NZMB2-A250-BT-NA Molded Case Circuit Breaker - 25 kAIC
Part Number: NZMB2-A250-BT-NA
Quick Summary
NZMB2-A250-BT-NA molded case circuit breaker from Eaton protects electrical panels and motor circuits in demanding industrial environments. This device helps prevent downtime by delivering robust overload and short-circuit protection at a 250 A rating and 25 kAIC capacity. Certification details are provided by the manufacturer and are verified in the Eaton specification sheet; consult the datasheet for CE/UL status and IEC alignment. Built on the NZM2 frame with front frame clamp terminals and optional rocker lever or motor-drive accessories, it offers installation flexibility and reliable operation. For engineers and maintenance teams, the result is easier panel integration, consistent protection settings, and lower lifecycle costs through predictable performance and long-term durability.
Product Information
Extended Description
NZMB2-A250-BT-NA Eaton: MCCB NZM, NZM2 TM and Elec. Breakers, Circuit Breaker, 200-250A OL Prot. Rng, Frame clamp, front, Three-pole, 250A Perm. Current, 25 kA, 200-250A Set. Rng OL Prot., 1500-2500A Undelayed Adj. Rng., Rocker lever, motor drive optional
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB2-A250-BT-NA
EAN
4015081074310
Product Length/Depth
5.51 in
Product Height
5.86 in
Product Width
5.86 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.
Certifications
Contact Manufacturer
Amperage Rating
250 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
1500-2500A delayed
Setting Range Ol Protector
200-250A
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Front frame clamp
Overload range
200-250A
Number of poles
Three-pole
Trip rating
380-630 A
Compact circuit-breakers and switch-disconnectors up to 1600 A
Eaton Specification Sheet - NZMB2-A250-BT-NA
The NZMB2-A250-BT-NA delivers a 250 A rating and 440 Vac capacity, paired with a 25 kAIC short-circuit interrupt capability to safeguard distribution panels and motor-driven loads; this translates to reduced damage and lower downtime during fault events. The NZM2 frame with front frame clamp terminals simplifies wiring and mounting, enabling faster installation and safer, more reliable connections in panel assemblies. An adjustable overload range of 200-250 A and a delayed short-circuit release setting of 1500-2500 A allow precise tailoring to evolving load profiles, reducing nuisance trips while maintaining robust protection. Accessory options, including a rocker lever and motor-drive compatibility, enhance operator control and integration with automated machinery—benefiting commissioning and remote operation scenarios. The unit’s compact footprint (5.51 in L, 5.86 in H, 5.86 in W) and 5.17 lb weight support flexible layout planning in control panels and MCCs.
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FAQs
When deploying NZMB2-A250-BT-NA, ensure mounting on an appropriate NZM2 frame panel and verify clearance for front-frame access. The front frame clamp terminals simplify wiring and reduce assembly time, while the three-pole design supports synchronized protection across phases. Plan for the unit’s dimensions (5.51 in x 5.86 in x 5.86 in) and ensure compatible space within the switchgear cabinet. Also confirm compatibility with optional accessories such as rocker lever or motor-drive modules to match your control scheme.
This MCCB provides a 250 A amperage rating and 440 Vac voltage rating, with a short-circuit breaking capacity of 25 kAIC. It is a three-pole device with a Trip Type of T185 and an adjustable overload protection range of 200-250 A. The adjustable short-circuit release is 1500-2500 A (delayed), allowing configuration to suit motor loads and system fault tolerance while delivering reliable protection under peak demand conditions.
Yes, the NZMB2-A250-BT-NA is compatible with motor-drive environments thanks to its three-pole design, NZM2 frame, and available motor-drive accessories. The front-frame clamp connection supports secure wiring, and the unit’s protective characteristics help safeguard motor starters and drives from overloads and short circuits. For best results, pair with appropriate overload and short-circuit settings to match motor inrush profiles and drive transients.
Certification details for this Eaton MCCB are provided by the manufacturer; consult the official Eaton datasheet to confirm CE/UL status, IEC alignment, and any region-specific certifications. The Eaton specification sheet for NZMB2-A250-BT-NA is the authoritative source for exact certification coverage and installation recommendations. If you need formal proof for compliance, request the latest certs or conformance documents from Eaton directly.
The device carries a one-year warranty from installation or eighteen months from shipment, whichever occurs first, reflecting its reliability in rugged environments. By delivering predictable trip behavior and robust fault protection, it minimizes unplanned downtime and reduces panel maintenance costs. The combination of high interrupt capacity, precise setting options, and available accessories supports faster commissioning, easier retrofits, and a lower total cost of ownership over the equipment lifecycle.