Schneider Electric CC64.3 Low Voltage Circuit Breaker

Schneider Electric's Square D CC64.3 thermal unit is an overload protection accessory for 480 V motor-starter circuits. It provides Class 20 thermal overload protection with a selectable full-load current range of 37.7 to 40.0 A, enabling precise motor protection within common CC-frame starter configurations. Designed for use with Square D AR magnetic starters, the CC64.3 fits NEMA Size 3 and 4 starter assemblies (frame CC), making it a standard option in low-voltage motor control panels. This thermal unit is intended for motor-control applications in 480 V AC panels, delivering reliable protection against overload conditions without external sensing devices. For proper installation, verify compatibility with your specific starter model and enclosure and ensure the supply and motor current align with the 37.7–40.0 A setting in the CC64.3 specifications.