Eaton NZMB2-AF30-BT-NA Molded Case Circuit Breaker - 25 kAIC
Part Number: NZMB2-AF30-NA
Quick Summary
NZMB2-AF30-BT-NA is a three-pole molded case circuit breaker designed for distribution protection in industrial panels. Users often struggle with panel space constraints and nuisance trips during motor start or fault conditions; this unit offers precise trip characteristics in a compact footprint. In addition to robust electrical performance, it aligns with typical field certifications and installation practices; verify region-specific approvals with the manufacturer as part of your compliance plan. With a fixed thermal trip and an adjustable magnetic release (T185), a 30 A rating at 440 Vac, and NZM2 frame compatibility, it supports safe, scalable protection in modern control cabinets. Choose NZMB2-AF30-BT-NA to improve reliability while simplifying retrofit and spare-part planning for ongoing maintenance.
Product Information
Extended Description
NZMB2-AF30-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMB2, Fixed thermal, adjustable magnetic trip, Three-pole, 30A, 440 Vac, 25 kAIC, Distribution circuit protection, 30-30A, 350-350A delayed, Front screw, 30-30A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB2-AF30-NA
EAN
4015082691455
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
30 A
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
350-350A delayed
Setting Range Ol Protector
30-30A
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Front screw
Overload range
30-30A
Number of poles
Three-pole
Feature → Business Impact → Application: Three-pole NZMB2 frame and 30 A rating deliver reliable distribution protection with a high interrupt capacity, reducing the risk of cascading faults in motor feeders and panels. Application: panel boards and manufacturing control cabinets benefit from predictable protection and easier OEM-to-field integration. Feature → Business Impact → Application: Fixed thermal protection paired with adjustable magnetic trip (T185) enables selective coordination and reduced nuisance trips, supporting safer startup sequences and downtime reduction. Application: motor control centers and process lines requiring precise fault protection in dynamic load conditions. Feature → Business Impact → Application: Short-circuit breaking capacity of 25 kAIC provides robust fault tolerance against high inrush currents and short faults, lowering the likelihood of equipment damage and extending component life. Application: high-demand industrial environments with elevated fault current levels. Feature → Business Impact → Application: Front frame clamp terminals simplify installation and future maintenance, enabling quick panel mounting and field replacements. Application: retrofit projects and new panel builds where fast, secure connections are essential. Feature → Business Impact → Application: Included rocker lever and motor drive accessories offer enhanced control options and easier commissioning, reducing start-up times and enabling streamlined control logic. Application: control cabinets and protective interlock scenarios in automated lines.
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FAQs
The NZMB2-AF30-BT-NA uses a front frame clamp mounting system compatible with the NZM2 frame. Before installation, verify correct phase connection and trip settings (T185) and ensure the panel has adequate space for the device footprint (4.05 in L, 4.13 in W, 7.24 in H). Use the rocker lever accessory if required for manual operation, and reference the Eaton specification sheet during retrofit to ensure alignment with existing NZM2-based assemblies.
Key specs include a 30 A amperage rating, 440 Vac voltage rating, three poles, and a short-circuit breaking capacity of 25 kAIC. The trip type is fixed thermal with an adjustable magnetic release (T185), and the setting range for overload protection is 30-30 A, with a delayed short-circuit release at 350-350 A. This combination supports reliable protection for panel boards and motor feeders.
Yes. The three-pole design, NZM2 frame compatibility, front frame clamp, and 25 kAIC interrupt capacity make it suitable for motor control centers and distribution panels. The adjustable magnetic trip and fixed thermal protection provide selective coordination, helping to prevent nuisance trips during motor start-ups while delivering robust fault protection in MCC installations.
Verify regional certifications and approvals with Eaton, as specific marks (such as CE, UL, or IP ratings) may vary by region and application. The NZMB2-AF30-BT-NA is designed to integrate with the NZM2 family, but end-user compliance should be confirmed via the Eaton datasheet and local electrical standards to ensure regulatory alignment and safe operation.
Expect reduced downtime due to reliable overload and short-circuit protection, and lower maintenance costs from modular NZM2 compatibility and readily available accessories (rocker lever, motor drive). The 30 A rating at 440 Vac supports scalable protection across multiple feeders, while the 25 kAIC interrupt capacity minimizes damage during faults, extending component life and lowering replacement frequency.