What is a film capacitor?

The capacitor is a device (part) that performs this charging and discharging of accumulated charges as its function. εr : Relative Permittivity 2. Types of (fixed) capacitors 3. Types of Film Capacitors “Miler” ( Du-Pont) is famous.

How do you calculate the life of a film capacitor?

For the life of a film capacitor, the Mean Time To Failure(MTTF), which is calculated by the inverse of the failure rate, is used as the basis for the life calculation. If a capacitor is used at high temperatures, its service life will be shortened due to thermal deterioration.

What happens if a metallized film capacitor is over withstand voltage?

*) In case of the metallized film capacitors (evaporated metal electrode type), if voltage in excess of the withstand voltage (or apparently in excess of the withstand voltage due to the lowering of withstand voltage) is applied, self-healing will happen continuously.

What is a high-voltage pmlcap capacitor?

The internal element of the capacitor is polypropylene, which has been conventionally used to handle high currents. In addition, in response to the market demand for high heat resistance, we are developing a module with a high-voltage PMLCAP internal element that can withstand 125°C or higher.

What happens if a capacitor is used at high temperatures?

If a capacitor is used at high temperatures, its service life will be shortened due to thermal deterioration. In case when a capacitor is to be used at high temperatures, please derate the operating voltage in accordance with the graphs as given below.

What happens when ripple current is applied on a capacitor?

In the case when ripple current is applied on a capacitor, Joule heat will be generated. The capacitor temperature rise on this occasion is given by the Formula 7.