Eaton ND312T35W Precision Electronic Circuit Protection for High-Power Systems
Precision Protection for Critical Power Systems
The ND312T35W is part of Eaton’s industry-leading Series C family of molded case circuit breakers, engineered to meet the evolving demands of modern electrical infrastructure. Built on the versatile NG-frame platform, this breaker combines high interrupting capacity with advanced electronic trip technology to safeguard equipment and personnel alike.
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At the heart of the ND312T35W is the Digitrip 310 RMS electronic trip unit, which delivers microprocessor-based precision protection. The LSG trip system—featuring Long-Time, Short-Time, Instantaneous, and Ground Fault functions—provides adjustable, coordinated protection against overloads, short circuits, and ground faults. This flexibility allows engineers to fine-tune protection settings to match specific application requirements, improving system coordination and reducing nuisance tripping.
High-Capacity Performance
Rated for 1200A continuous current at 600 Vac, the ND312T35W is designed for high-power distribution and motor control applications. It offers impressive interrupting capacity:
85 kAIC at 240 Vac
50 kAIC at 480 Vac
These ratings ensure reliable fault-clearing capability even in systems with high available fault currents, providing peace of mind for critical industrial processes, data centers, and commercial facilities.
Designed for 80% Duty Applications
The ND312T35W is rated for 80% duty applications, making it suitable for continuous operation at up to 80% of its 1200A rating. This design aligns with common electrical distribution practices where the breaker is applied in enclosures or panelboards with specific heat dissipation characteristics.
Backed by Eaton’s Legacy
As part of Eaton’s Series C line, the ND312T35W benefits from decades of circuit protection innovation and a global service network. Like all NG-Frame breakers, it is suitable for reverse feed applications, providing additional installation flexibility.
Applications
The ND312T35W is ideal for a wide range of high-capacity applications, including:
Main and branch circuit protection in industrial distribution panels
Motor control centers
Large HVAC systems
Commercial and institutional building power distribution
Data center and critical power infrastructure
OEM electrical assemblies and panelboards
