The Emerson Flow Control (Alco) 057331-120V 12W F Coil AMG Junction Box is an OEM solenoid valve coil designed to drive proper valve actuation in HVAC and refrigeration systems. Powered by 120V, it energizes the valve assembly to open or close refrigerant flow based on control signals. https://www.partshnc.com/057331-emerson-flow-control-alco-120v-12w-f-coil-amg-junctionbx