Eaton NZMB1-A63-NA Molded Case Circuit Breaker - 25 kAIC
Part Number: NZMB1-A63-NA
Quick Summary
NZMB1-A63-NA Molded Case Circuit Breaker from Eaton protects distribution panels in industrial power systems. Sizing for front-frame mounting, 480 Vac operation, and a 25 kAIC fault rating without nuisance trips can be a real design challenge for panel builders. Typical certifications buyers seek include SIL for safety, CE for European compliance, and IP ratings for enclosure protection; confirm with Eaton per regional requirements. This model combines the NZM1 frame with a 50–63 A setting range and a rugged 3‑pole configuration, delivering reliable protection and easier installation to support project timelines and total cost of ownership in industrial facilities.
Product Information
Extended Description
NZMB1-A63-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM1-frame, NZMB1, Thermal-magnetic trip type, 380-630A trip rating, Three-pole, 63A, 480 Vac, 25 kAIC, Distribution circuit protection, Rocker lever, 50-63A, Front frame clamp, 50-63A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB1-A63-NA
EAN
4015082722555
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
63 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
50-63A
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Front frame clamp
Overload range
50-63A
Number of poles
Three-pole
Trip rating
380-630 A
Compact circuit-breakers and switch-disconnectors up to 1600 A
Eaton Specification Sheet - NZMB1-A63-NA
Feature → Business Impact → Application: The NZMB1-A63-NA uses a 3-pole NMZ frame with front-frame clamp and a rocker lever, enabling quick, precise installation and reliable field operation in control panels. This translates to reduced commissioning time and lower field wiring errors for panel builders working on 480 Vac distributions in manufacturing lines. Feature → 63 A amperage rating with 480 Vac voltage rating provides circuit protection tailored to medium-load feeders, supporting compact panel layouts and safer fault handling in data centers and machine rooms. Feature → 25 kAIC interrupt capacity and T268 trip type deliver robust short-circuit protection, reducing arc energy exposure and maintenance costs in high-demand environments. Feature → 50–63 A setting range and 380–630 A trip rating offer adjustable protection to match circuit coordination strategies, improving system reliability and reducing unnecessary trips during startup surges. Feature → Rocker lever and front-frame clamp design simplify replacement and servicing, enabling faster maintenance windows and reduced downtime in utility rooms and switchgear cabinets. Feature → Eaton warranty and documented specifications provide risk mitigation for procurement teams, supporting compliance and asset lifecycle planning. Long-tail keywords addressed include NZM1 frame molded case circuit breaker, 480 Vac distribution protection, three-pole MCB with 25 kAIC, 50-63 A adjustable trip, and front-frame clamp compatibility.
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FAQs
The NZMB1-A63-NA uses a front-frame clamp connection and a three-pole NZM1 frame. Begin by ensuring panel cutout compatibility and verifying 480 Vac supply. Mount the unit using the clamp mechanism, align the poles, and secure the rocker lever to enable a firm, tactile on/off operation. This design reduces field wiring errors and speeds up commissioning in industrial panels.
This breaker is rated for 63 A with a 480 Vac voltage rating and a short-circuit breaking capacity of 25 kAIC. The trip type is T268 with a trip rating of 380-630 A and an overload range of 50-63 A, making it suitable for distribution protection in medium-load feeders and for coordination with upstream protection devices.
Yes. With a 25 kAIC interrupt capacity and a robust 3-pole design, NZMB1-A63-NA provides strong fault current handling for distribution circuits in manufacturing and process environments, helping to minimize arc exposure and protect downstream equipment.
Eaton’s warranty for this product follows the Selling Policy 25-000, providing one year from installation or 18 months from shipment—whichever occurs first—ensuring after-sales support and coverage during the initial lifecycle of the breaker.
Key documents include the Eaton Specification Sheet for NZMB1-A63-NA and the catalog 'Compact circuit-breakers and switch-disconnectors up to 1600 A.' You can access the spec sheet at Eaton's site and the catalog through the provided download links in the product data to verify ratings, installation guidelines, and compliance notes.