Eaton Cutler-Hammer C321KM30 Mechanical Interlock 322838-753 Enhanced Durability: Features lead-free bearings

Enhanced Durability: Features lead-free bearings and an internal non-return valve to prevent refrigerant migration during off-cycles

ensuring the hydronic heating system operates within the manufacturer's specified thermal parameters without nuisance lockouts

this power toggle switch eliminates intermittent connectivity issues that often trigger nuisance fault codes

and control boards from voltage fluctuations

OEM Standards: Manufactured by Trane/American Standard to ensure precise wattage and voltage alignment with system controls

Eaton Cutler-Hammer C321KM30 Mechanical Interlock 322838-753 Enhanced Durability: Features lead-free bearingsThe Eaton Cutler Hammer C321KM30 Mechanical Interlock is a critical field installable accessory designed for Freedom Series NEMA size 00, 0, 1, and 2 starters and contactors. Engineered for horizontal mounting configurations, this heavy duty mechanical link ensures positive electrical isolation by preventing two opposing contactors from closing simultaneously. This hardware is essential for reversing motor applications and multi source power transfers