... Modular magnetic building ac contactor are particularly suitable for switching lighting installations,heat pumps,night storage heating, ... /50-60HZThermal continuous current (Ith ):24, 40, 63ACurrent ratings for AC1:24, 40, 63APole number:4 ( Either as main ... or auxiliary contacts )Back up fuse g1 max ratings:35, 63, 80AMechanical endurance:10million cyclesElectrical endurance:1million ...