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Do power AC capacitors have a defined shelf life?

The AC capacitors do not have a shelf life like DC capacitors do. Capacitors stored under normal storage condition will not have any adverse affect on their capacitance value. The power capacitors can work satisfactorily for a specified life as per catalog if the following conditions are met:

- Power Capacitors should be stored in an environment where the temperature is within -25 C and +55 C, also no corrosion on metallic parts.
- Visually Power Capacitors must be in good condition i.e no external damage.
- Subject the Power Capacitors for Insulation resistance test and it should be more than 20 Mega-Ohm.
- Capacitance value must be within limits as per relevant IS/IEC standard.
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