Eaton NZMB2-AF250-NA Molded Case Circuit Breaker - 25 kAIC
Part Number: NZMB2-AF250-NA
Quick Summary
NZMB2-AF250-NA molded case circuit breaker protects motor and distribution panels with reliable short-circuit protection. A common pain point is misaligned trip settings and difficult maintenance in harsh industrial environments. Certification status is provided by the manufacturer on request, with CE/IEC-style listings commonly required by regional regulators. This front-screw, three-pole device offers a compact NZM2 frame footprint and an adjustable short-circuit release, delivering predictable protection while reducing downtime and service costs. For engineers and procurement teams, it translates into faster wiring, easier replacement, and consistent protection across critical motor and panel applications. Its 250 A rating, 25 kAIC interrupt capability, and 440 Vac electrics ensure scalable protection for medium-sized drives and feeders.
Product Information
Extended Description
NZMB2-AF250-NA Eaton: MCCB NZM, NZM2 TM and Elec. Breakers, Circuit Breaker, 250-250A OL Prot. Rng, Screw connection, front, Three-pole, 250A Perm. Current, 25 kA, 250-250A 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-AF250-NA
EAN
4015082711009
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
250-250A
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Front screw
Overload range
250-250A
Number of poles
Three-pole
Compact circuit-breakers and switch-disconnectors up to 1600 A
Eaton Specification Sheet - NZMB2-AF250-NA
Front screw connection simplifies wiring and termination in compact control panels. This arrangement reduces installation time and minimizes risks from loose connections in vibration-prone environments. The result is faster commissioning, fewer field issues, and consistent performance across shifts. The NZM2 frame, combined with a three-pole configuration, delivers balanced protection across all phases for motor drives and feeders. Its standardized dimensions support rapid stocking and straightforward retrofits in existing panels. Engineers appreciate predictable mounting and interchangeability within the Eaton NZM family. With a 250 A amperage rating and 440 Vac voltage, the NZMB2-AF250-NA aligns with common industrial power architectures. The device offers a 25 kAIC short-circuit breaking capacity and an adjustable 1500-2500A delayed range for high-energy fault control. The front-screw connection, rugged construction, and clear setting ranges enable precise protection coordination in demanding environments. Rocker lever and motor-drive accessories expand operational flexibility, enabling quick manual control and straightforward integration with motor-control schemes. The device's installation and commissioning are simplified by front access and clear labeling of settings. Eaton's proven design supports long service life in harsh industrial settings. Warranty coverage follows Eaton's 25-000 policy, offering one year from installation or 18 months from shipment to accommodate field deployment schedules. The robust MCCB design reduces total cost of ownership by lowering maintenance frequency and spare-part needs. In practice, this translates to higher line availability and lower total downtime. Additionally, the compact footprint and front-access installation help minimize panel depth and simplify cabling, improving overall panel density. The combination of protection accuracy, fast trip performance, and modular options makes NZMB2-AF250-NA suitable for distribution panels and motor control centers across industrial sectors.
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FAQs
NZMB2-AF250-NA uses a front-screw connection and a three-pole NZM2 frame, making it compatible with most standard distribution panels and motor-control centers. Ensure panel cutouts and mounting provisions match the NZM2 footprint and torque specifications per Eaton guidelines.
Key specs include a 250 A amperage rating, 440 Vac voltage rating, and 25 kAIC short-circuit breaking capacity. The device includes an adjustable short-circuit release range of 1500-2500 A and a T185 trip type for coordinated protection.
Yes. Its three-pole design, 250 A rating, and compatibility with motor-control schemes (with optional motor-drive accessories) make it suitable for motor drives and associated feeders in industrial panels.
Certification status is provided by the manufacturer on request. In many regions, CE and IEC/UL-style listings are common demand; confirm the exact regional certifications with Eaton for your project footprint.
Eaton’s policy 25-000 provides one year warranty from installation or 18 months from shipment, whichever comes first. Routine maintenance is typically driven by environment and load, but this MCCB’s robust design supports longer service life with lower total cost of ownership.