Electric　power　and　electronic　technology　combined　single-chip　digital　processor　technology　and　traditional　AC　contactor　to　form　a　new-type　intelligent　hybrid　AC　contactor.　In　the　contact　system,　the　contact　of　each　phase　connected　with　only　one　unidirectional　SCR　component　in　parallel.　A　kind　of　immune　genetic　algorithm　(IGA)　is　applied　to　optimal　design　of　the　control　and　structure　parameters　of　the　intelligent　hybrid　AC　contactor.　Because　single-chip　processor　is　adopted　in　the　control,　the　optimized　control　of　the　whole　process　is　easily　achieved.　Especially　it　realized　the　non-arc　closing　and　breaking.　It　greatly　saved　the　cost　in　terms　of　technical　and　economic　indicators.　It　is　a　new-type　intelligence　explosion-proof　electric　apparatus　(EXEA).