Can polyester capacitors replace electrolytic capacitors?

Everyone knows that the replacement of capacitors is not arbitrary. It should be safe to use in the guidance of professional technicians or in the manufacturer's instructions. Someone asked if the polyester capacitor damage in the desk lamp can be replaced with an electrolytic capacitor. The answer is no. Because electrolytic capacitors cannot be used in AC circuits, they can cause short circuits.

Why do you say that polyester capacitors cannot be changed or replaced at will? Everyone knows that several indicators related to performance are: capacitance type, capacitor package, capacitance value, and capacitor heat resistance temperature. The type of capacitor must match the original, whether it is a ceramic capacitor, a polyester capacitor, a safety capacitor, a monolithic capacitor, a thin film capacitor, etc., the new capacitor must match.

The capacitor package includes the distance of the capacitor pin, the height of the capacitor, etc., that is, the appearance characteristics of the capacitor. Make sure the capacitors can be mounted on the board. The capacitance value is an important characteristic of the capacitor. In some places, the capacitor is used to block the DC signal. In some places, it is used to store a small amount of power. In some places, it is used to filter out high-frequency AC signals. In some places, it is used to rectify. And so on, and these functions are directly dependent on the capacitance of the capacitor. So choosing a polyester capacitor for replacement should take these factors into account.