Eaton NZMB1-AF50-NA Molded Case Circuit Breaker - 25 kAIC
Part Number: NZMB1-AF50-NA
Quick Summary
The Eaton NZMB1-AF50-NA molded case circuit breaker protects critical power circuits in distribution panels. Engineers often battle nuisance trips and unexpected downtime; this device delivers precise thermal-magnetic protection to minimize outages and simplify maintenance. In practice, buyers look for certifications such as CE marking, UL listings, and IEC compliance—verify the exact status in the datasheet before procurement. With a compact NZM1 frame, 50 A rating at 480 Vac, and a 25 kAIC short-circuit capacity, it supports scalable industrial protection while easing installation and service. This combination helps streamline procurement, reduce inventory variety, and improve overall system reliability.
Product Information
Extended Description
NZMB1-AF50-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM1-frame, NZMB1, Thermal-magnetic trip type, 300-500A trip rating, Three-pole, 50A, 480 Vac, 25 kAIC, Distribution circuit protection, Rocker lever, 50-50A, Front frame clamp, 50-50A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB1-AF50-NA
EAN
4015082722074
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
50 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
50-50A
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Front frame clamp
Overload range
50-50A
Number of poles
Three-pole
Trip rating
300-500 A
Feature: 50 A amperage rating and three-pole design provides balanced protection for three-phase loads. Business Impact: reduces risk of unbalanced faults and nuisance trips in demanding automation lines, improving process uptime. Application: ideal for industrial automation panels and motor control centers where reliable three-phase protection is required. Feature: NZMB1 with NZM1 frame and thermal-magnetic T268 trip type enables fast, selective fault interruption. Business Impact: minimizes collateral outages and simplifies fault diagnostics during maintenance. Application: suitable for distribution panels in manufacturing environments and process lines. Feature: Short-circuit breaking capacity of 25 kAIC and a setting range of 50-50A limits fault energy and supports safe maintenance. Application: motor-driven systems and high-current circuits in data centers and assembly lines. Feature: Front frame clamp connection and rocker lever accessory simplify mounting and field serviceability. Business Impact: reduces installation time and retrofit effort, lowering labor costs. Application: panel builders and retrofit projects. Feature: Compact dimensions and weight (2.68 in depth, 5.71 in height, 3.54 in width; ~2.45 lb) enable efficient enclosure integration. Business Impact: saves panel space, reduces shipping and handling costs, and supports modular build-out. Application: space-constrained control panels in factories and automation racks. Long-tail keywords embedded include NZM1 frame, 3-pole MCCB, thermal-magnetic trip, distribution circuit protection, front frame clamp, rocker lever, 50 A protection, and 480 Vac operation to address common search intents of engineers and procurement teams.
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FAQs
The NZMB1-AF50-NA should be mounted using the front frame clamp in a compatible 3‑phase panel. Wire the three poles for line and load with correct protection coordination, and use the rocker lever for testing and manual operation as needed. Verify that the panel is rated for 480 Vac and at least 25 kAIC fault current, then perform a functional check after installation to ensure proper tripping and re-closing behavior.
Key specifications include a 50 A amperage rating, 480 Vac voltage rating, 25 kAIC short-circuit breaking capacity, three-pole configuration, NZMB1 circuit breaker type, NZM1 frame, T268 trip type, front frame clamp connection, and a 50-50 A setting range for overload protection. It also features a rocker lever accessory and a 2.68 in depth, 5.71 in height, and 3.54 in width footprint.
Yes. It is designed for distribution circuit protection with a three-pole configuration, 50 A rating, 480 Vac operation, and a 25 kAIC interrupt capacity, making it well-suited for manufacturing and automation distribution panels. The front frame clamp and rocker lever aid quick installation and testing, while the compact NZM1 frame fits standard panel layouts.
The product lists Compliance as 'Contact Manufacturer,' so confirm the exact certifications with Eaton. Typical requirements in industry include CE marking, UL listings, and IEC standards where applicable. For regulated sectors, ensure the datasheet or Eaton support confirms these certifications before final approval and procurement.
Benefits include reduced downtime due to precise thermal-magnetic protection and predictable trip behavior, which streamline maintenance planning. The unit carries a warranty of one year from installation or eighteen months from shipment, whichever occurs first, minimizing risk for early field issues. The compact footprint and easy mounting reduce installation labor and field modification costs, contributing to lower total cost of ownership over time.