Eaton NZMB2-A32-NA NZM MCCB - 3-Pole, 440V, 25 kAIC
Part Number: NZMB2-A32-NA
Quick Summary
NZMB2-A32-NA is a molded case circuit breaker designed for dependable distribution protection in industrial control panels. In practice, improper protection coordination can lead to nuisance trips, unexpected downtime, and costly fault investigations during motor starts. The unit uses the NZMB2 within the NZM2 frame and combines fixed thermal with adjustable magnetic trip for precise fault clearance up to 25 kAIC. With front screw connections and a compact profile, installation in dense switchgear is straightforward, while its 32 A rating and 440 Vac supply cover common industrial loads. Warranty terms provide protection for installation shifts, and the device aligns with standard distribution circuit protection practices, enabling consistent safe operation and reduced total cost of ownership.
Product Information
Extended Description
NZMB2-A32-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMB2, Fixed thermal, adjustable magnetic trip, 350-350A, Three-pole, 32A, 440 Vac, 25 kAIC, Distribution circuit protection, 25-32A, 350-350A delayed, Front screw, 25-32A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB2-A32-NA
EAN
4015082692087
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
32 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
350-350A delayed
Setting Range Ol Protector
25-32A
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Front screw
Overload range
25-32A
Number of poles
Three-pole
Trip rating
350-350 A
Eaton Specification Sheet - NZMB2-A32-NA
Selling Policy 25-000 - Distribution and Control Products and Services
Feature → Business Impact → Application. The NZMB2-A32-NA employs a compact molded case design within the NZM2 frame, which reduces panel footprint and simplifies sourcing, enabling faster panel builds and easier replacements in distribution panels and motor control centers. Feature → Fixed thermal with adjustable magnetic trip (T185) → Business impact: precise protection coordination that minimizes nuisance trips and gear wear while maintaining fast fault clearance, reducing unplanned downtime and maintenance costs. Application: suitable for feeders and loads where inrush and short-circuit events require reliable, adjustable protection settings. Feature → 32 A, 440 Vac, 25 kAIC ratings → Business impact: ensures appropriate interrupt capacity for standard industrial circuits and safe operation under fault conditions, supporting regulatory and safety requirements. Application: main distribution circuits and feeder protections in control panels. Feature → Front screw connections → Business impact: simplifies installation, maintenance, and field upgrades in crowded switchgear spaces, improving install times and reducing commissioning risk. Application: OEM and retrofit projects with tight enclosure layouts. Feature → Accessories including rocker lever and motor drive → Business impact: enhances operability and integration with motor control systems, enabling smoother start/stop sequences and easier remote operation. Application: control panels, MCCs, and machine centers. Warranty and service considerations → Business impact: clear policy reduces risk of unexpected costs and supports long-term service planning. Application: industrial environments with strict uptime targets.
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FAQs
Begin with de-energizing the panel and verifying isolation. Mount the breaker on the DIN rail or in the chassis, align the front screw terminals with the wiring terminals, and firmly tighten to the recommended torque. Ensure the rocker lever or motor drive accessory is correctly installed for the intended control scheme. Verify that the 32 A setting and 25 kAIC rating align with the protected circuit and close the panel. Always follow the Eaton datasheet for field wiring guidelines.
The unit provides fixed thermal overload protection with an adjustable magnetic trip (T185). The overload protection setting range is 25–32 A, with a delayed 350 A setting for specific coordination scenarios. This combination supports selective tripping for motor circuits and feeders, reducing nuisance trips while preserving rapid fault clearance during short circuits.
Yes. The three-pole configuration, 32 A rating, and 25 kAIC interrupt capability make it well suited for motor control centers and distribution panels in manufacturing and processing environments. The NZM2 frame provides compatibility with common Eaton accessories, and front screw connections simplify installation in compact MCCs and retrofit projects.
Key ratings include 32 A amperage, 440 Vac voltage, and 25 kAIC short-circuit protective capacity. It is a three-pole device with front screw connections, part of the NZM2 frame family, and supports a 350 A delayed setting for certain overload coordination needs. These specifications support reliable distribution circuit protection in industrial applications.
The product carries Eaton’s warranty policy: one year from installation or eighteen months from shipment, whichever occurs first. Compliance details are provided by the manufacturer; verify exact certifications and regulatory attestations in the Eaton datasheet and supporting documents for your region and application.