Eaton NZMB2-AF70-NA Molded Case Circuit Breaker - 25 kAIC
Part Number: NZMB2-AF70-NA
Quick Summary
NZMB2-AF70-NA molded case circuit breaker from Eaton protects panel distribution and motor circuits in industrial plants. For engineers juggling uptime and fault isolation, this unit minimizes nuisance trips and simplifies panel integration. Certifications such as CE, UL, and IP ratings are typically provided by Eaton; verify the exact listings with the manufacturer for the latest compliance status. Designed for 440 Vac systems with a 70 A protection and 25 kAIC interrupt capability, it supports reliable distribution protection and motor protection in demanding environments. This model integrates with the NZM2 frame and front screw terminals, delivering practical installation and long-term cost savings.
Product Information
Extended Description
NZMB2-AF70-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMB2, Fixed thermal, adjustable magnetic trip, Three-pole, 70A, 440 Vac, 25 kAIC, Distribution circuit protection, 70-70A, 480-800A delayed, Front screw, 70-70A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB2-AF70-NA
EAN
4015082691615
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
70A
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
480-800A delayed
Setting Range Ol Protector
70-70A
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Front screw
Overload range
70-70A
Number of poles
Three-pole
Feature: 70 A amperage rating and 440 Vac operation. Business Impact: Provides reliable protection for standard distribution feeders and motor circuits, reducing nuisance trips and improving uptime. Application: Suitable for three-phase panels and motor control centers in industrial facilities. Feature: 25 kAIC short-circuit breaking capacity. Business Impact: Withstands high fault currents, enabling safer, faster isolation of faults and less collateral damage. Application: Main feeders and critical process lines in high-energy environments. Feature: Trip Type T185 with adjustable magnetic release (480-800 A delayed). Business Impact: Enables precise coordination with upstream protection, improving selective tripping and system reliability. Application: Coordinate protection in complex distribution schemes. Feature: NZMB2 frame with front screw connections. Business Impact: Improves installation speed and field wiring accessibility in tight panels, reducing labor costs. Application: New or retrofit panel boards in manufacturing and processing plants. Feature: Accessories including rocker lever and motor drive. Business Impact: Extends control options and retrofit flexibility without replacing the device. Application: Motor-driven equipment and expandability in evolving electrical systems. Feature: Short-circuit release adjustment range of 480-800 A delayed and 70-70 A setting range. Business Impact: Supports precise overload and short-circuit coordination to optimize protection schemes. Application: Industrial distribution where fault current levels vary.
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FAQs
NZMB2-AF70-NA is a three-pole moldable case circuit breaker designed for NZM2 frames with front screw connections. It fits standard 70A distribution panels and motor control centers that operate at 440 Vac, supporting straightforward field wiring and reliable three-phase protection. When planning retrofits, verify enclosure depth and clearances to ensure comfortable terminal access and proper thermal performance.
The unit provides 70 A rated current, 440 Vac voltage rating, and a short-circuit breaking capacity of 25 kAIC. It features a fixed thermal trip with an adjustable magnetic trip (T185) and a setting range for short-circuit release of 480-800 A delayed, enabling coordinated protection for varied fault scenarios in industrial circuits.
Yes. With three poles and 25 kAIC interrupt capacity, the NZMB2-AF70-NA is well-suited for motor protection in three-phase manufacturing lines. The adjustable magnetic trip and front-accessible terminals simplify coordination with motor drives and upstream protection, helping to prevent nuisance trips while safeguarding critical loads.
Current data indicates general compliance information is available from the manufacturer. Specific certifications such as CE, UL, or IP-related listings should be confirmed directly with Eaton to ensure the exact listings for your region and application are current and applicable to your installation.
The product is covered under Eaton’s warranty policy 25-000, offering one year from installation or eighteen months from shipment, whichever comes first. This, combined with robust protection capabilities and straightforward installation, supports predictable maintenance planning and a favorable return-on-investment in distribution protection.