MDI Mercury Displacement 235NO 24A 18 Contactor R 22 Key Benefits: Dual Function Design: Functions Key Benefits: Dual Function Design: Functions as a liquid receiver to store refrigerant during varying load conditions and a muffler to suppress compressor discharge noise Universal 1 2" NPT Connection: Standard 1 2 inch well assembly threading allows for seamless integration into existing pipe taps and thermal tanks This 35 amp mercury contactor features a 24V AC coil and is designed for normally open operation providing a reliable interface for controlling resistive loads like electric heaters or high intensity lighting