Manufacturer Name: Carrier Product Number: HN52KD020 OEM Part Number: HN52KD020 Product Description: 2Pole40amp 24V Contactor Weight:1.09lbs/494.42g The Carrier HN52KD020 Contactor is an electrically operated switch that is used in Carrier HVAC systems. a device that opens and closes an electrical circuit using a small current to control a large current. https://www.partshnc.com/2pole40amp-24v-contactor-2