Vishay Roederstein products include a wide range of film capacitors, including polyester, polypropylene, polycarbonate and RFI suppression, as well as aluminum electrolytic capacitors. Vishay Roederstein facilities are approved to ISO 9001/ISO9002, and most of the film and RFI capacitors are approved to CECC specifications. Three different dielectric materials are used in the manufacture of Vishay Roederstein film capacitors, and each is suited to different applications:

polyester film capacitors are classed as general purpose capacitors
polypropylene film capacitors are typically used in AC and pulse applications at high frequencies
polycarbonate film capacitors are the preferred choice in filter and timing applications

The Vishay Roederstein portfolio of RFI (Radio Suppression) capacitors is extensive, and these products carry additional international approvals to UL, EN, CISPR and IEC specifications with regard to electrical safety.