Eaton NZMB2-AF70-BT-NA Molded Case Circuit Breaker - 25 kAIC
Part Number: NZMB2-AF70-BT-NA
Quick Summary
The Eaton NZMB2-AF70-BT-NA molded case circuit breaker protects distribution panels from faults. Unplanned outages and nuisance trips challenge uptime and drive maintenance costs. Certifications and compliance are critical; confirm CE/UL status and other applicable certifications with Eaton, as data often lists general compliance rather than specifics. This model delivers a 70A rating at 440 Vac with a 25 kAIC interrupt capacity, and features a front frame clamp and accessories such as a rocker lever and motor drive for streamlined installations. By aligning with standard NZM2 frame protection and reliable trip technology, it supports safer, more efficient panel operation and reduces lifecycle costs for electrical distribution.
Product Information
Extended Description
NZMB2-AF70-BT-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, Box, Distribution circuit protection, 70-70A, 480-800A delayed, Front frame clamp, 70-70A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB2-AF70-BT-NA
EAN
4015081072866
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
Terminals
Box
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 frame clamp
Overload range
70-70A
Number of poles
Three-pole
Feature → Business Impact → Application: The NZMB2-AF70-BT-NA provides 70A protection at 440 VAC with a 25 kAIC interrupt rating, enabling robust short-circuit protection for distribution circuits in industrial panels. This translates to faster fault interruption, reduced arc energy exposure, and improved uptime in automation and processing lines. Application: suitable for distribution circuits in panelboards and MCCs requiring reliable three-pole protection and selectable trip characteristics. Feature → Business Impact → Application: Fixed thermal with adjustable magnetic trip (T185) enables tailored protection against overloads and short circuits, improving coordination with downstream devices and reducing nuisance trips in motors and feeders. Application: motor-driven loads and critical automation equipment in manufacturing lines. Feature → Business Impact → Application: NZM2 frame with front frame clamp and box terminals simplifies panel mounting and wire routing, cutting installation time by aligning with standard electrical cabinets. Application: retrofit projects and new panel builds seeking compact, install-friendly protection devices. Feature → Business Impact → Application: Rocker lever and motor drive accessories expand control options and remote operation compatibility, supporting flexible automation architectures. Application: retrofit for control panels and machine builds. Feature → Business Impact → Application: 4.1 lb weight and compact dimensions (4.13 in W x 7.24 in H x 4.05 in D) optimize panel density and serviceability. Application: space-constrained electrical distribution installations.
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FAQs
Begin with de-energizing the panel and confirming compatibility with the NZM2 frame. Mount the unit using the front frame clamp, align with duct and busbar layout, and secure wiring to the box terminals. Install the rocker lever or motor drive accessory if required, set the trip to 70A, and verify the 25 kAIC interrupt rating during commissioning.
The breaker is a three-pole NZMB2 type with a 70A amperage rating, 440 VAC operating voltage, and a 25 kAIC short-circuit breaking capacity. It uses a fixed thermal, adjustable magnetic trip (T185) and features front frame clamp terminals for straightforward panel installation.
Yes. The three-pole, 70A design with 25 kAIC capacity is well-suited for distribution circuits within motor control centers. The available motor drive accessory and rocker lever support remote control and flexible operation, while the front-frame clamp simplifies integration into MCC panels.
The provided data lists Compliances as 'Contact Manufacturer,' so CE/UL/SIL status and IP ratings are not explicitly specified here. For regulatory compliance in your region, confirm the current certifications with Eaton prior to procurement and installation.
The NZMB2-AF70-BT-NA delivers dependable protection with a standard one-year warranty, minimizing downtime due to nuisance trips. Its compact NZM2 frame and accessible front-frame clamp reduce service time and spare-part complexity, contributing to lower total-cost-of-ownership in panel assemblies and automations.