The push button series are used in controlling circuit of AC voltage up to 660V/AC 50Hz or 60Hz, and DC voltage below 400V. They are used for controlling signal and interlocking perposes. The main body of the push buttons are made of zinc alloy and high-grade anti-flam plastic. The contact are made of special silver alloy in order to provide high conductivity. These are suitable for electrical appliances circuit of AC voltage up to 380V/50Hzm abd DC voltage below 380V.