Dc marked capacitors cant be used on ac. As the rectified ac voltage then reduces towards zero the capacitor discharges and hence helps give a more steady dc output from the rectifier. Why Do Electronic Circuits Use Dc Current Instead Of Ac Ac And Dc Capacitor Types With Electrolytic Tantalum Plastic Film Ceramic Capacitors Steps To Convert The 230v To 5v Dc To Powerup The Circuits How the dc and ac capacitors work in a. Capacitor used in ac or dc . Ac marked capacitors can be used on dc. They can be connected to the power supply in any direction and their capacitance does not effect by the reversal of polarity. On other words these capacitors are used to couple or link ac input signal to next stage of circuit by blocking the undesired dc signals. A spec for ac is a must if it must stand ac. Used in both ac and dc systems the non polar capacit...
