... price,punctual delivery,high quality Application:F4-D-A1 series auxiliary contact blocks are installed on the top of F5-D-A2 ... control relay or AC contactor for more auxiliary contacts. Adopting the contact functions of sliding frictions,the item can be ... DN31Contactnumber2NCNO+NC2NO2NO+2NC4NO4NC1NO+3NC3NC+1NC F4-D-A1, A2 series auxiliary contact blocks