The Cutler Hammer–Eaton C25BNB220T-2P is a 20A, 24V contactor designed for dependable switching of electrical loads in HVAC equipment such as air conditioners, heat pumps, and air handlers. When energized, its low-voltage coil closes the contacts to deliver controlled power to compressors, fans, or other components. https://www.partshnc.com/c25bnb220t-cutler-hammer-eaton-2p-20a-24v-contactor