The insulation resistance curve remains high with increasing temperature. Construction with this dielectric is typically extended foil with metallized electrodes. This dielectric is made from a solvent casting process and performs best as a metallized construction. Metallized types feature vapor deposited metal electrodes and give significant size savings, a definite plus in precision applications. Self-healing removes a fault or short circuit by vaporizing the electrode in the region of the short and restores the capacitor to useful life, thereby greatly extending the lifetime of the capacitor.
Typical encasements are wrap and fill, epoxy molded, preformed box and metal enclosed.
Since Polycarbonate is sensitive to moisture absorption, particular attention should be paid to the encasements used for precision applications. For Polycarbonate requirements, please contact the factory.