Eaton NGS312032MA12S03Z08 Molded Case Breaker - UL Listed
Part Number: NGS312032MA12S03Z08
Quick Summary
Eaton Series G molded case circuit breaker protects electrical systems in industrial environments by interrupting overloads and short circuits. This model, NGS312032MA12S03Z08, is designed for reliable protection in high-demand panels where uptime matters. Engineers often face nuisance trips, poor selectivity, and space constraints that complicate panel design. This MCCB carries UL Listed, IEC Rated, and CSA Certified markings, signaling rigorous compliance across North American and international installations. With the NG-frame, 310+ RMS trip capability, and optional aux switch or shunt trip, it delivers precise coordination and flexible control. Together with its compact footprint and 50/60 Hz compatibility, it supports efficient panel integration, factory acceptance testing, and long-term maintenance planning.
Product Information
Extended Description
NGS312032MA12S03Z08 Eaton: Eaton Series G electronic molded case circuit breaker, NG-frame, 310+ RMS, LSI trip, Three-pole, 1200A, 480 Vac, 85 kAIC at 240 Vac, 50 kAIC at 480 Vac, Line and Load, Metric, 50/60 Hz, with aux switch, and shunt trip
Product Name
Eaton Series G molded case circuit breaker
Catalog Number
NGS312032MA12S03Z08
UPC
786679328569
Product Length/Depth
6 in
Product Height
9 in
Product Width
16.5 in
Product Weight
48 lb
Certifications
UL Listed IEC Rated CSA Certified
Type
Series G
Application of Tap Rules to Molded Case Breaker Terminals
Application of Tap Rules to Molded Case Breaker Terminals
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
Breaker service centers
Circuit Protection, Molded Case Circuit Breakers, Volume 4, Tab 2
MOEM MCCB product selection guide
MOEM MCCB product selection guide
MOEM MCCB product selection guide
Feature: NG-frame, three-pole Series G design. Benefit: The compact frame enables denser panel layouts and simplified wiring, reducing cabinet width and enabling quicker commissioning in high-density applications. Application: Ideal for machine control panels and distribution racks in manufacturing lines and process industries. Feature: 1200 A current rating with 480 Vac operation and high fault interrupt ratings. Benefit: Supports large motor feeders and high-inrush loads while maintaining reliable interruption performance, minimizing unplanned downtime and speeding repair cycles. Application: Protective devices for feeders, main distribution, and critical process lines in industrial facilities. Feature: 310+ RMS operating current and LSI trip, plus optional auxiliary switch and shunt trip. Benefit: Enables precise protection with selective coordination, enhanced safety via remote trip signaling, and flexible control schemes for complex automation environments. Application: Turnkey panel assemblies, safety interlocks, and remote control architectures. Feature: Certifications and standards compliance. Benefit: UL Listed, IEC Rated, and CSA Certified ensure regulatory readiness across global panels, simplifying procurement and reducing compliance risk for multinational deployments. Application: OEMs and integrators serving North American and international markets. Feature: Line and Load terminals, metric compatibility, 50/60 Hz operation, and robust mechanical specs. Benefit: Ensures international compatibility and easy integration with existing MCCB accessories and panel hardware, reducing field adjustments and installation time. Application: Panel builders, machine builders, and OEMs requiring scalable protection solutions.
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FAQs
This Eaton Series G MCCB is designed for three-phase power systems and interfaces with NG-frame configurations. It supports 50/60 Hz operation, line and load termination, and metric mounting, making it suitable for modern industrial panels, machine controls, and distribution boards where compact footprint and reliable protection are required.
The device is rated for 1200 A and 480 Vac with high interrupting capabilities (85 kAIC at 240 Vac and 50 kAIC at 480 Vac). It uses Long-Time/Short-Time (LSI) trip technology for precise fault protection, and supports 50/60 Hz systems, enabling broad applicability in industrial environments.
Auxiliary switches provide status feedback for control circuits, while shunt trips enable remote tripping in response to safety interlocks or plant-wide safety systems. Together, they improve coordination, reduce manual intervention, and support safer, more responsive machine and panel operation.
The NGS312032MA12S03Z08 carries UL Listed, IEC Rated, and CSA Certified markings. These certifications support cross-border deployment, supplier audits, and compliance with North American and international electrical protection standards.
Follow Eaton’s installation guidelines for torque specs on line/load terminals, use compatible accessories (aux/shunt options), and schedule regular functional testing of the LSI trip. Maintain clean terminations and verify coordination with upstream protections to sustain reliability and minimize nuisance trips.