This standard applies to polar and bipolar tantalum electrolyte capacitors with solid and non-solid electrolyte for use in electronic equipment. It comprises capacitors for long-life applications and capacitors for general-purpose applications. Capacitors for special purpose application may need additional requirements. This standard covers three basic sub-families, namely: Sub-family 1: Fixed non-solid electrolyte tantalum capacitors with foil electrode. 1A: Plain foil electrode. 1B: Etched foil electrode. Sub-family 2: Fixed non-solid electrolyte tantalum capacitors with porous anode. Sub-family 3: Fixed solid electrolyte tantalum capacitors with porous anode.