Intelligent　AC　contactor　is　a　new-type　controllable　apparatus,　composed　by　a　microprocessors　controlled　intellectual　control　module　and　the　traditional　AC　contactor,　So　it　can　be　optimizing　control　in　all　process　of　closing,　closed　and　breaking.　One　outstanding　advantage　of　intelligent　AC　contactor　is　to　realize　the　zero-current-break　control.　The　contact　systems　will　have　no　arc　or　small　arc　in　the　closing　and　breaking　course,　resulting　in　higher　electrical　endurance　and　operating　frequency,　and　better　performance　indexes.　This　paper　presents　the　control　method,　the　operation　principle,　and　the　experiment　results　of　two　kinds　of　intelligent　AC　contactor.　The　operation　dependability　of　contactor　improves　greatly,　and　realizes　saving-material　and　saving-energy.　In　addition,　the　contactors　have　some　other　functions;　such　as　communicate　with　the　monitor　etc.　©　2005　IEEE.