Eaton NZMB1-4-A25 Molded Case Circuit Breaker - 25 kAIC
Part Number: NZMB1-4-A25
Quick Summary
The Eaton NZMB1-4-A25 molded case circuit breaker protects electrical distributions in industrial panels. However, accurate device sizing and coordination across multi-load systems can lead to nuisance trips and unplanned downtime. Industry practitioners look for CE certification, IP-rated enclosures, and safety-related certifications such as SIL ratings where applicable; verify with the manufacturer for the exact unit. By selecting a four-pole NZMB1 with a thermal-magnetic trip and standardized box terminals, you gain distribution circuit protection, streamlined installation, and a lower total cost of ownership.
Product Information
Extended Description
NZMB1-4-A25 Eaton: Eaton Series NZM complete molded case circuit breaker, NZM1-frame, NZMB1, Thermal-magnetic trip type, Four-pole, 25A, 440 Vac, 25 kAIC, Box, Distribution circuit protection
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB1-4-A25
UPC
786685889290
Product Length/Depth
2.68 in
Product Height
5.71 in
Product Width
3.54 in
Product Weight
3 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
25 A
Voltage rating
440 Vac
Trip Type
T268
Circuit breaker type
NZMB1
Terminals
Box
Frame
NZM1
Class
Distribution circuit protection
Interrupt rating
25 kAIC
Number of poles
Four-pole
Feature: Thermal-magnetic trip type provides precise overload and short-circuit protection. Business Impact: Reduces nuisance trips and equipment damage, improving uptime. Application: Ideal for 440 Vac distribution circuits in manufacturing lines. Feature: Four-pole design and box terminals simplify wiring and improve cross-phase protection. Business Impact: Safer, faster installation with reduced wiring errors and commissioning time. Application: Distribution panels and motor control centers in industrial facilities. Feature: NZM1 frame compatibility supports easy replacements and inventory optimization. Business Impact: Lower maintenance costs and faster upgrades, minimizing downtime during retrofits. Application: Retrofit programs and OEM replacement scenarios. Feature: Interrupt rating of 25 kAIC enables safe operation in higher fault-current environments. Business Impact: Enhanced protection for feeders and critical loads, reducing the risk of equipment damage. Application: Manufacturing floors and shared power distribution networks. Feature: 25 A rating and 440 Vac rating align with common industrial feeders and three-phase systems. Business Impact: Proper sizing improves coordination, reduces nuisance trips, and supports scalable expansion. Application: General distribution circuits within control cabinets and panels. Warranty and service: One-year warranty from installation or eighteen months from shipment, per Eaton policy, contributing to predictable lifecycle costs and service planning.
Get a Quick Quote for a Eaton NZMB1-4-A25
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton NZMB1-4-A25?
Enquire Now
FAQs
Yes. The NZMB1-4-A25 is designed around the NZM1 frame, facilitating straightforward replacement in existing installations. With four poles and box terminals, it supports quick field wiring, minimized downtime, and inventory alignment with other NZM1-based devices.
The device carries a 25 kAIC interrupt rating, which defines the maximum fault current it can interrupt without damage. This level supports reliable protection in medium to high-energy circuits, reduces the risk of collateral equipment damage, and enhances overall system safety in industrial power distribution.
For 440 Vac circuits, ensure proper line-and-load wiring to the box terminals, observe torque specifications, and verify compatible breakers in the NZM1 family. The four-pole design improves cross-phase protection, while the thermal-magnetic trip aids selective tripping. Adhere to local electrical codes and manufacturer guidance during installation.
Compliances are provided by the manufacturer; key industry certifications commonly considered include CE marking and regional regulatory approvals. IP protection levels depend on enclosure and installation context. Always check the latest manufacturer confirmation for the exact unit to ensure regional compliance and acceptance in your facility.
The product carries Eaton’s policy of one year from installation or eighteen months from shipment, whichever comes first. This warranty supports maintenance planning and amortization of the initial hardware cost, contributing to lower long-term maintenance risk and a clearer total cost of ownership for distribution protection upgrades.