Powercap Systems [Madras] Pvt Ltd is the manufacturer and supplier of Common Mode Chokes. Powercap Systems [Madras] Pvt Ltd ISO 9001: 2000, SO / TS: 16949: 2002 and ISO 14001: 2004 EMS certified company. Common Mode Chokes are used in switched mode power supplies and frequency converters to attenuate common-mode interference. They are available using ferrite UU cores. The Common Mode Chokes can be of variable types.