Eaton NZMB1-S8-CNA Molded Case Circuit Breaker - Magnetic Trip 25 kAIC
Part Number: NZMB1-S8-CNA
Quick Summary
Molded case circuit breaker protection for motor circuits in industrial machinery ensures reliable switching during faults. This Eaton NZMB1-S8-CNA unit provides magnetic-only tripping to guard motors without the nuisance trips that can come from overload releases. Operators often struggle with mis-timed protection that hampers uptime; this device addresses that by focusing on rapid fault isolation and robust short-circuit capability. Certification details are listed by the manufacturer and can vary by market, with CE, IP, and SIL documentation typically specified per installation—please consult Eaton's data sheet for your region. For plant-wide protection, this breaker pairs with the NZM1 frame and supports screw-terminals, making integration straightforward while delivering motor-protective reliability across industrial panels.
Product Information
Extended Description
NZMB1-S8-CNA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM1-frame, NZMB1, Magnetic only trip, 1000-1750A, Three-pole, 8A, 480 Vac, 25 kAIC, Motor protect. without overload release, Thermomagnetic switch off, 100-125A, Screw
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB1-S8-CNA
EAN
4015081027590
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
Special features
Thermomagnetic switch off
Amperage Rating
8 A
Voltage rating
480 Vac
Trip Type
Magnetic only
Circuit breaker type
NZMB1
Frame
NZM1
Class
Motor protection without overload release
Setting Range Ol Protector
100-125A
Short-circuit breaking capacity
25 kAIC
Interrupt rating
25 kAIC
Connection
Screw
Rated operational current
55 kW at 400 Vac 37 kW at 230 Vac
Number of poles
Three-pole
Trip rating
1000-1750 A
Feature: Magnetic-only trip with a setting range of 100-125 A and a 25 kAIC interrupt rating. Business impact: precise motor protection that reduces nuisance trips and ensures fast fault clearance. Application: ideal for three-pole motor circuits in industrial panels using the NZM1 frame. Feature: Thermomagnetic switch off adds protection against overheating and fault conditions, improving equipment longevity. Business impact: extended motor life and reduced downtime through dual-stage response. Application: suitable for motor loads with inrush characteristics common in conveyors and pumps. Feature: Compact NZM1 frame with screw connections facilitates straightforward installation in existing control panels. Business impact: lowers labor time during retrofits and enhances panel density. Application: supports standard DIN rail and cabinet layouts. Feature: Rated 8 A with 480 Vac and 25 kAIC capacity, plus three-pole operation. Business impact: supports moderate to high-power motors while delivering strong fault current handling. Application: common in machine control, mixers, and process equipment. Feature: Motor protection without overload release class means you can pair with an external overload device if required. Business impact: flexible protection strategy and compliant coordination with downstream relays. Application: ideal in environments where separate overload protection is preferred for maintenance or regulatory reasons.
Get a Quick Quote for a Eaton NZMB1-S8-CNA
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-S8-CNA?
Enquire Now
FAQs
NZMB1-S8-CNA uses a three-pole configuration within the NZM1 frame and employs screw termination. To install, mount the unit in the panel, align with the NZM1 mounting pattern, and secure conductors under the screw terminals per the product sheet. Ensure the panel rail and wiring clearances meet local codes, and verify the setting range 100-125 A if overload protection is used in coordination with an external device.
The breaker provides an 8 A amperage rating, 480 Vac voltage rating, and a short-circuit capacity of 25 kAIC. It supports three-pole operation and is designed for motor protection with magnetic-only trip characteristics. The setting range for overload coordination is 100-125 A, though the 8 A rating refers to normal operating current. Use caution to coordinate with downstream protections.
Yes. NZMB1-S8-CNA is specified as motor protection without overload release, meaning it can be used for magnetic-only motor protection in applications where an external overload relay is used for coordinated protection. This configuration can simplify panel wiring and allow tailored overload protection to match motor and conductor sizing in your installation.
Documentation is provided by Eaton; the product page links to the Eaton Specification Sheet NZMB1-S8-CNA for detailed electrical data. Compliances are listed as 'Contact Manufacturer' in the data set, so verify regional certifications (such as CE, IP, and SIL) directly with Eaton for your installation locale and project requirements.
Warranty terms follow Eaton's policy: typically one year from installation or 18 months from shipment, whichever occurs first. For maintenance, refer to the official Eaton warranty document and the Specification Sheet for any region-specific conditions. Keeping spare contact parts, screws, and a test procedure helps minimize downtime during protective device commissioning and service.