KEMET PME271M and PME264 metallized paper capacitors feature a high dielectric constant with excellent self-healing properties and transient handling capabilities. KEMET metallized paper capacitors develop a high ionization level due to the impregnated dielectric material and maintain outstanding reliability in mains connected and other low frequency applications. KEMET PME271M and PME264 capacitors are constructed of a multi-layer metallized paper dielectric encapsulated and impregnated in self-extinguishing material meeting the requirements of UL94V-O. Typical applications of the KEMET PME271M and PME264 capacitors are interference suppressors.
KEMET PME271M and PME264 metallized paper capacitors are classified as both X2 capacitors. X2 capacitors are used in positions where a failure of the capacitor would not expose anybody to danger of electric shock. Both PME271M and PME264 capacitors meet the most stringent IEC humidity class, 56 days; while maintaining the highest possible safety regarding active and passive flammability.
Self Healing of KEMET Impregnated Paper Capacitors
If a conducting particle or a voltage surge punctures the dielectric, an arc occurs at the point of failure melting the surrounding metal and insulating the area of the breakdown. In the metallized paper capacitor as processed by KEMET a breakdown caused by a short transient normally results in an improvement of the insulation resistance. KEMET metallized paper capacitors are to be preferred if the capacitor is to be used where uncontrolled transient voltages can occur.