Capacitors In Series Voltage Rating. R nvm vb 0 0015 c vb where. Since kirchhoff s voltage law applies to this and every series connected circuit the total sum of the individual voltage drops will be equal in value to the supply voltage vs.
Figure 1a shows a series connection of three capacitors with a voltage applied. The voltage rating is only the maximum voltage that a capacitor should be exposed to not the voltage that the capacitor will charge up to. Since their maximum rated voltage is only about 2 7 volts by connecting six such supercapacitors in series the operating voltage of the bank is raised to levels acceptable for automotive use.
Capacitors in series will have a lower total capacitance than any single one in the circuit which offers a higher total voltage rating.
But the second cap in series will be downstream or after that first cap. A capacitor may have a 50 volt rating but it will not charge up to 50 volts unless it is fed 50 volts from a dc power source. One is that the maximum rated voltage of a parallel connection of capacitors is only as high as the lowest voltage rating of all the capacitors used in the system. Another example for the use of serially connected capacitors is a possible replacement of a car battery with a capacitor bank made of supercapacitors.
