The Nidec-Embraco 2271161 ESP Start Relay is an electrical control device that assists HVAC compressors during startup by momentarily energizing the start winding. It ensures the compressor reaches operating speed smoothly and reliably before switching to run mode. Commonly used in residential and commercial air conditioners, heat pumps, and refrigeration systems, it enhances system p... https://www.partshnc.com/2271161-esp-nidec-embraco-start-relay