This part of IEC 60384 applies to aluminium electrolytic capacitors with solid (MnO2) and nonsolid electrolyte primarily intended for d.c. applications for use in electronic equipment. It covers capacitors for long-life applications and capacitors for general-purpose applications. Capacitors for special-purpose applications may need additional requirements. Capacitors for fixed surface mount aluminium electrolytic capacitors are not included but they are covered by IEC 60384-18.