Thermal magnetic molded case circuit breaker. Bimetallic strip provides inverse time overload protection, magnetic trip releases instantly under short-circuit fault. Trip-free mechanical structure ensures reliable breaking even when handle is held closed. Optional auxiliary contacts support remote status feedback for PLC monitoring.

Certification: UL489, CSA

Insulated molded housing, bimetallic thermal element, magnetic trip assembly, contact group, arc chute and toggle operating mechanism. Common faults: contact overheating, nuisance tripping, arc chamber carbon buildup and trip element aging.