X2 capacitors are required to achieve a stable performance during operational life while meeting safety requirements. The metalized film dielectric is a key factor with regards to the safety aspect. For example, the polypropylene dielectric provides excellent self-healing characteristics. However, improvements were necessary to maintain stability in high temperature and high humidity environments. CSD engineer recognized these challenges and researched materials that would produce more robust parts for extreme applications. As a result, improvements to all of the major capacitor components have been implemented, including the metallization layer, the film used as the dielectric, the resin which fills the package, and the box . X2 capacitors are used not only for EMI suppression. Thanks to their robustness and resistance to humidity and high temperatures, they are also suitable for voltage dividers in capacitive power supplies – for example, those of smart meter.( www.csdcapacit...