How to reduce the life expectancy of a capacitor?

Exceeding the permissible temperature on the capacitor surface (every increase in operating temperature of 7 K cuts life expectancy in half). 2.Overvoltages, overcurrents and high in- rush currents even if they only occur briefly or cyclically (a continuous increase in the operating voltage of the capacitor of 8 % cuts life expectancy in half).

Do capacitors have a specific life period?

Yes, capacitors do have a life period. They are expected to be replaced in Power Circuits (DC & AC filters in converters, etc.) after approximately 8 to 10 years of installation. Capacitors deteriorate in capacitance value and insulation strength due to internal chemical changes.

Do capacitors have a shelf life?

Yes, capacitors have a shelf life. The electrolyte used in capacitors can dry out after a few years, causing the capacitor to lose its properties. In fact, capacitors are a major cause of failure in many consumer and industrial electronic equipment.

How to calculate lifespan of film capacitor?

Below is the formula for calculations of lifespan of film capacitors. Le = Ll x (Vr/Va)⁷ x 2ˣ Where; Le = Expected lifespan of film capacitor in the application. Ll = Load lifespan rating of film capacitor. X = (Tm – Ta – ΔT)/10 ΔT = I² x ESR / (B x A) Tm = Film capacitor’s maximum temperature rating. Ta = Ambient temperature of the application.

What is the relationship between capacitor lifespan and operating temperature?

The relationship between capacitor lifespan and operating temperature follows Arrhenius' Law of Chemical Activity, which says that lifespan of a capacitor doubles for every 10°celsius decrease in the temperature. Below are the formulas for capacitor lifespan calculations for different type of capacitors.

How to calculate lifespan of ceramic capacitor?

Below is the formula for calculations of lifespan of ceramic capacitors. Le = Ll x (Vr/Va)³ x (Tm/Ta)⁸ Where; Le = Expected lifespan of ceramic capacitor in the application. Ll = Load lifespan rating of ceramic capacitor. Tm = Ceramic capacitor’s maximum temperature rating. Ta = Ambient temperature of the application.