COB push button is suitable for circuit of AC.50 or 60HZ, rated voltage to 500V, rated current up to 5A. 1.COB push button is ... suitable for circuit of AC.50 or 60HZ, rated voltage to ... inwharf, machine tools, textile machineries, etc. 2.There are three specifications in this series:2 lines,4 lines and 6 lines. push button switch