Eaton LWC3400D09 Molded Case Breaker - 100 kAIC

Interchangeable thermal-magnetic trip (T207) provides precise protection coordination across multiple protective zones, reducing nuisance trips and enabling selective clearing of faults. This business outcome translates to improved equipment uptime and lower maintenance costs as technicians spend less time diagnosing trips. In practice, the LWC3400D09 is well suited for panelboards and switchgear in manufacturing lines, data centers, and process facilities where reliable trips are critical. High current capability is another core feature: a 400 A rating at 690 Vac and 250 Vdc, with a 100 kAIC interrupt rating at 415 Vac and a three-pole configuration. This combination supports main feeders and downstream protection in harsh industrial environments, helping prevent cascading outages and enabling fast isolation of faults. The ability to withstand high fault currents without compromising electrical integrity reduces unplanned downtime and extends system life. Design and installation advantages come from an L-frame complete breaker, line and load end caps, and metric mounting hardware. The complete breaker assembly simplifies field wiring, reduces assembly time, and improves connection reliability in tight switchgear spaces. The three-pole geometry also ensures balanced protection across phases, critical for motors and drives. Compatibility with the Series C family and Series C F-Frame documentation (including time-current curves and product selection guides) helps engineers select the right device with confidence. The IEC rated certification supports global installations, while the world-class frame and mounting standards streamline procurement and reduce the risk of misfit components. Warranty and service support are aligned with Eaton policies (25-000) offering a one-year warranty from installation or eighteen months from shipment, whichever occurs first. This coverage, combined with readily available spare parts, minimizes total cost of ownership and ensures predictable maintenance cycles in plant environments.