Daikin-McQuay 300009405 Compressor Overload

The Daikin-McQuay 300009405 Compressor Overload is a protective electrical safety component used in refrigeration and air conditioning compressor circuits. It is designed to monitor operating current and temperature conditions and interrupt power when abnormal load conditions occur in HVAC systems. It is typically mounted within the compressor electrical assembly of chillers, split units, and packaged equipment, where it prevents motor stress during excessive current draw or overheating. It works a vital role in maintaining compressor reliability by reducing electrical and thermal strain during continuous operation in commercial and cooling and heating setups ensuring stable performance during routine system cycles.