Eaton NZMB2-M160 Molded Case Circuit Breaker - 25 kAIC
Part Number: NZMB2-M160
Quick Summary
NZMB2-M160 molded case circuit breaker protects industrial motors and distribution panels from overcurrent. Engineers often struggle with coordinating trips and setting correct magnetic protection without sacrificing uptime. Certification details are provided by the manufacturer, and the official NZMB2-M160 datasheet covers key ratings and approvals for three-pole operation, 600 Vac, and 25 kAIC. This solution supports motor protection in 3-phase power systems while delivering reliable coordination, ease of maintenance, and scalable protection in modern control panels. Use cases include industrial machinery, packaging lines, and process equipment where modular protection and quick replacement matter for total cost of ownership.
Product Information
Extended Description
NZMB2-M160 Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMB2, Fixed thermal, adjustable magnetic trip, 1000-1750A delayed, Three-pole, 125A, 600 Vac, 25 kAIC, Motor protection, Screw, 37 kW at 230 Vac, 55 kW at 400 Vac
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMB2-M160
EAN
4015082657161
Product Length/Depth
5.51 in
Product Height
5.86 in
Product Width
5.86 in
Product Weight
5.17 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
125 A
Voltage rating
600 Vac
Trip Type
T185
Circuit breaker type
NZMB2
Frame
NZM2
Class
Motor protection
Accessories
Rocker lever, motor drive
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 delayed
Compact circuit-breakers and switch-disconnectors up to 1600 A
Eaton Specification Sheet - NZMB2-M160
The NZMB2-M160 offers a compact, three-pole protection solution built on the NZM2 frame, aligning with common motor control center configurations and simplifying panel layouts. Benefit: streamlined installation and reliable motor protection reduces unplanned downtime in high-demand environments; Application: motor drives and equipment in manufacturing lines. The device provides 125 A amperage rating and 600 Vac voltage rating, ensuring compatibility with standard industrial power distribution while preserving protection margins in medium-voltage motor circuits. Benefit: prevents nuisance trips and protects wiring; Application: conveyor systems and presses. The fixed thermal element with an adjustable magnetic trip (T185) enables precise overload and short-circuit coordination. Benefit: optimizes trip curves for motor startup; Application: processes with variable load. The 25 kAIC short-circuit breaking capacity offers robust fault interruption, improving safety margins in fault events. Benefit: reduces fault propagation; Application: critical drives and feeders. Accessories such as rocker lever and motor drive support quick operation and integration with control strategies. Benefit: faster maintenance and easier commissioning; Application: retrofit projects and new installations. The screw connection design simplifies wiring and ensures solid, vibration-resistant terminations in harsh industrial environments. Benefit: lower installation risk and long-term reliability; Application: panel assemblies in automation lines.
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FAQs
The NZMB2-M160 uses screw connections for a secure, panel-friendly installation on the NZM2 frame. It is designed for three-pole wiring and accepts standard motor protection configurations. For exact torque values and mounting guidance, refer to the Eaton specification sheet and installation instructions, and consider adding the rocker lever or motor drive accessories for faster commissioning.
This device combines fixed thermal protection with an adjustable magnetic trip (T185) to tailor response for motor inrush and overload conditions. With a 125 A rating and 600 Vac operating range, it provides reliable overload protection and robust short-circuit interruption (25 kAIC), helping protect motors and power wiring while supporting seamless control-panel integration.
Compliance details are provided by the manufacturer, and the official Eaton NZMB2-M160 datasheet outlines key ratings and approvals. Users should consult Eaton’s specification sheet to confirm current CE, UL, IEC, or other certifications applicable to their region and installation requirements.
The device features a 125 A amperage rating with a 600 Vac voltage rating and a 25 kAIC interrupt capacity. It employs fixed thermal protection along with an adjustable magnetic trip (T185) and supports a delayed trip rating in the 1000–1750 A range, enabling selective coordination for evolving motor loads.
The rugged NZMB2-M160 design minimizes nuisance trips and supports long service life in demanding environments. Its modular motor-protection approach, compatibility with rocker lever and motor-drive accessories, and straightforward screw-term connections reduce downtime during maintenance, simplify retrofits, and improve protection coordination across industrial automation assets.