Eaton NZMB2-A250-NA Molded Case Breaker - 25 kAIC
Part Number: NZMB2-A250-NA
Quick Summary
NZMB2-A250-NA molded case circuit breaker protects industrial power panels with reliable, fast-acting overcurrent protection. This three-pole device supports demanding machine controls and distribution boards while offering straightforward wiring. Operators often struggle with nuisance trips and hard-to-tune field settings; this unit addresses that with an adjustable overload range of 200-250 A and a delayed range of 1500-2500 A. Certification information is listed as 'Contact Manufacturer' for this data; verify CE/UL ratings with Eaton during procurement. Built on the NZM2 frame and designed for front-screw wiring, it accommodates motor-drive accessories, delivering compact, predictable protection and easier installation for automation panels and control centers.
Product Information
Extended Description
NZMB2-A250-NA Eaton: MCCB NZM, NZM2 TM and Elec. Breakers, Circuit Breaker, 200-250A OL Prot. Rng, Screw connection, 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-NA
EAN
4015082711054
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
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 screw
Overload range
200-250A
Number of poles
Three-pole
Trip rating
380-630 A
The NZMB2-A250-NA features a 250 A amperage rating and 440 Vac voltage rating with a 25 kAIC short-circuit capacity, delivering robust protection for feeders and motors. This combination translates to fewer nuisance trips and improved equipment uptime, especially in high-load automation environments where fault currents can spike. With three-pole construction on the NZM2 frame, it provides balanced protection across all phases, which is essential for reliable motor control centers and machine automation panels. The front screw connection streamlines field wiring, reduces installation time, and ensures secure terminations even in tight panels, while the option to add a rocker lever or motor-drive accessory enhances operability and remote control integration. Finally, adjustable OL protection (200-250 A) and delayed release (1500-2500 A) enable precise coordination with downstream protection devices, promoting safer shutdown sequences and lower total ownership costs.
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FAQs
Install the NZMB2-A250-NA as a front-screw connected, three-pole device on the NZM2 frame. Plan for a compact footprint and ensure proper clearance for ventilation. Use the rocker lever option if manual control is desired, and verify wiring integrity after mounting. Follow safety practices and consult the product documentation for torque specs and terminal sizing.
Key specs include a 250 A amperage rating, 440 Vac operating voltage, and a 25 kAIC short-circuit breaking capacity. It is a three-pole NZMB2 device on the NZM2 frame with front screw connections. The trip type is T185, and the setting range for overload protection is 200-250 A with a delayed short-circuit range of 1500-2500 A, plus a 380-630 A trip rating.
Yes. With three-pole protection, NZM2 frame compatibility, and front-access wiring, this MCCB is well-suited for motor control centers and machine automation panels. Optional motor-drive accessories and the compact footprint support integrated control strategies, enabling coordinated protection for drives, feeders, and equipment in automation environments while maintaining serviceability.
The data shows Certifications as 'Contact Manufacturer,' so confirm the exact regulatory markings (for example CE, UL, CSA) with Eaton or your distributor. This ensures alignment with regional electrical codes and customer requirements before purchase or integration into a control system.
Warranty terms are listed as Eaton Selling Policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. For ongoing support, access Eaton technical resources and authorized service providers to assist with commissioning, maintenance, and any non-conformance or replacement needs.