Eaton NZMB1-A100-NA Moulded Case Circuit Breaker - 25 kAIC
Part Number: NZMB1-A100-NA
Quick Summary
The Eaton NZMB1-A100-NA molded case circuit breaker protects distribution panels by interrupting fault currents with reliable thermal-magnetic trip. Engineers often struggle with nuisance trips or undersized protection that disrupts production and drives up maintenance costs. Compliance planning is essential, so verify regulatory certifications and standards with Eaton before deployment. With a 100 A rating at 480 Vac and a 25 kAIC short-circuit capacity, the NZMB1-A100-NA combines compact form with robust protection, delivering quick installation and scalable protection for modern electrical distribution systems. This makes it suitable for panel boards, MCCs, and auxiliary feeders in industrial facilities seeking uptime and safety.
Product Information
Extended Description
NZMB1-A100-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM1-frame, NZMB1, Thermal-magnetic trip, 600-1000A trip rating, Three-pole, 100A, 480 Vac, 25 kAIC, Distribution circuit protection, Rocker lever, 80-100A, Front frame clamp, 80-100A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB1-A100-NA
EAN
4015082722586
Product Length/Depth
2.68 in
Product Height
5.71 in
Product Width
3.54 in
Product Weight
2.45 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
480 Vac
Trip Type
T268
Circuit breaker type
NZMB1
Frame
NZM1
Class
Distribution circuit protection
Accessories
Rocker lever
Setting Range Ol Protector
80-100A
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Front frame clamp
Overload range
80-100A
Number of poles
Three-pole
Trip rating
600-1000 A
Feature: Thermal-magnetic trip (T268) provides fast fault interruption and selective coordination; Business Impact: Reduces arc flash exposure and minimizes downstream damage by isolating faults quickly; Application: Ideal for critical distribution feeders in MCCs and panel boards. Feature: 100 A continuous amperage rating at 480 Vac; Business Impact: Aligns protection with typical industrial loads, avoiding unwarranted trips and enabling smoother startup sequences; Application: Main protection for 480 Vac distribution panels. Feature: 25 kAIC short-circuit breaking capacity and interrupt rating; Business Impact: Withstands high fault currents, enhancing equipment safety and reducing downtime during faults; Application: Industrial facilities with high short-circuit potential. Feature: Front frame clamp connection; Business Impact: Facilitates secure, fast mounting and clean wiring layout, shortening installation time; Application: Retrofit or new panel assemblies in compact enclosures. Feature: 80-100 A overload setting range; Business Impact: Adjustable protection enables precise coordination with downstream devices; Application: Customizable protection for variable loads. Feature: Three-pole NZMB1 with NZM1 frame; Business Impact: Standardized form factor simplifies replacement, stocking, and cross-compatibility across Eaton’s NZM family; Application: Distribution circuit protection across industrial ecosystems. Feature: Rocker lever accessory; Business Impact: Clear status indication and easier testing helps maintenance teams verify operation quickly; Application: Field service and routine inspections. Feature: Compact dimensions (2.68 in D × 5.71 in H × 3.54 in W) and 2.45 lb weight; Business Impact: Panel-friendly footprint reduces cabinet depth and enables denser layouts; Application: Enclosed control panels and switchgear assemblies.
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FAQs
The NZMB1-A100-NA uses a front-frame clamp and NZM1 frame, making it compatible with Eaton NZM-series panel boards and standard distribution enclosures designed for molded case breakers of this size and rating.
Key specs include 100 A amperage rating, 480 Vac voltage, 25 kAIC short-circuit breaking capacity, and a thermal-magnetic trip (T268). Use these to coordinate upstream fusing, downstream devices, and motor loads.
Yes. With three poles, 480 Vac protection and adjustable 80-100 A overload setting, it suits feeders and motors within MCCs, providing reliable protection while maintaining selective coordination with downstream protection.
Compliances are listed as 'Contact Manufacturer.' Verify applicable CE/UL or industry-specific certifications with Eaton documentation before procurement and panel integration.
The rocker lever provides easy status verification, and its compact NZM1 form factor simplifies spare parts stocking. A reliable thermal-magnetic trip reduces nuisance trips, improving uptime and lowering maintenance costs.