X2 capacitors are used not only for EMI suppression, but thanks to their robustness and resistance to humidity and high temperatures, they are also suitable for voltage dividers in capacitive power supplies (smart meters mounted on the outside of buildings).
A new series of EPCOS X2 interference suppression capacitors offers stable capacitance values even under extremely humid conditions. The B3292*H/J* series for operating voltages of up to 305 V AC comprises types with rated capacitances ranging from 0.1 µF to 15 µF, lead spacings from 15 mm to 37.5 mm and operating temperature ranges from -40 °C to +110 °C. In addition, the capacitors, which employ a metallized polypropylene dielectric (MKP), also feature excellent self-healing properties. These allow weak dielectric areas to be burned out in the event of overvoltages.