Eaton NZMB2-A100-NA NZM MCCB - 25 kAIC 440 Vac
Part Number: NZMB2-A100-NA
Quick Summary
The Eaton NZMB2-A100-NA is a complete molded case circuit breaker for distribution protection in industrial panels. It is designed to deliver reliable, predictable protection for medium-current feeders while supporting simplified maintenance and fast fault isolation. Engineers often wrestle with nuisance trips and improper protection coordination that can cause unscheduled downtime; this device combines a fixed thermal trip with an adjustable magnetic trip to tailor response to motor loads and feeders. Compliance specifics such as CE marking, IP ratings, or SIL approvals are not listed on the data sheet, so verify with Eaton for your market. In practice, its NZM2 frame compatibility and three-pole configuration enable efficient, safe distribution circuit protection with straightforward front-mount serviceability and panel integration.
Product Information
Extended Description
NZMB2-A100-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMB2, Fixed thermal, adj. magnetic trip, 320-400A, Three-pole, 100A, 440 Vac, 25 kAIC, Distribution circuit protection, 80-100A, 600-1000A delayed, Front screw, 80-100A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB2-A100-NA
EAN
4015082692131
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
100 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
600-1000A delayed
Setting Range Ol Protector
80-100A
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Front screw
Overload range
80-100A
Number of poles
Three-pole
Trip rating
320-400 A
Feature → Business Impact → Application: The NZMB2-A100-NA uses an NZM2 frame and three-pole design to deliver a compact, common-assembly protection solution for industrial panels, reducing panel depth and simplifying configuration in new builds or upgrades. This translates to faster installation and lower panel labor costs when wiring and mounting breakers, especially in space-constrained spaces. Application: suitable for distribution circuits in manufacturing lines and control panels. Feature → Business Impact → Application: 100 A amperage rating paired with 440 Vac operation provides targeted protection for medium-current feeders, improving fault clearance and limiting downstream damage. This supports uptime, equipment longevity, and energy efficiency in and around machine bays and assembly lines. Feature → Business Impact → Application: Fixed thermal with adjustable magnetic trip (T185) and a setting range of 80–100 A plus 600–1000 A delayed response allows precise coordination with motors and feeders, reducing nuisance trips and improving system selectivity in complex power distribution schemes. Application: motor feeders, machine rooms, and distribution boards. Feature → Business Impact → Application: 25 kAIC short-circuit breaking capacity enhances fault withstand and safety during high-current faults, enabling more robust protection in panels that feed high-inertia loads or large motors. Application: critical power distribution sections in OEM equipment and plant substations. Feature → Business Impact → Application: Front screw connection simplifies field installation and serviceability, enabling faster panel rewiring, easier torque control, and reduced maintenance downtime. Application: retrofit projects and new builds requiring quick turnaround. Feature → Business Impact → Application: Optional accessories such as rocker lever and motor drive support remote or manual operation, expanding integration options with existing control architectures. Application: control panels with remote or automated switching requirements.
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FAQs
The NZMB2-A100-NA is built on the NZM2 frame and uses a front screw connection for easy mounting in distribution panels. It is a three-pole MCCB rated at 100 A and 440 Vac, making it suitable for standard industrial switchgear, machine control panels, and feeder configurations that require robust short-circuit protection and straightforward replacement in NZM2-based assemblies.
Key ratings include a 100 A amperage rating, 440 Vac voltage rating, and a 25 kAIC short-circuit breaking capacity. It features a fixed thermal trip with an adjustable magnetic trip (T185), with a setting range of 80–100 A and a delayed 600–1000 A range, designed for precise coordination with motor loads and feeders.
Its front screw connections simplify field mounting and servicing, enabling quicker replacement and easier torque control. The rocker lever and motor-drive accessories support flexible operation and remote control options, reducing downtime during maintenance and enabling smoother integration with existing control architectures.
Certification specifics such as CE marking, UL/IEC approvals, or IP ratings are not listed in the provided data. For a regulated installation, confirm with Eaton to obtain the exact approvals required for your market and application before deployment in compliant panels or hazardous environments.
By delivering reliable protection with fast fault clearance and reduced nuisance trips, the NZMB2-A100-NA lowers downtime and repair costs. Its modular NZM2 frame and easy installation cut labor time, while the robust 25 kAIC fault withstand enhances safety, contributing to lower total cost of ownership over the equipment lifecycle.