The ABB Installation Contactors ESB40-20N-06 (NO) 40 A, 2 NO, 0 NC, 230 V, Control Circuit 400 Hz are used to control single- and three-phase loads up to 40 A and can be operated by AC or DC. These contactors are made for use in household applications as well as in industrial environments. The following benefits are provided: hum-free operation, low power consumption and integrated overvoltage protection. Various contact combinations and accessories are available.