Electrolytic Capacitors Horn Capacitor 6800UF100V super aluminum electrolytic

Electrolytic Capacitors Horn Capacitor 6800UF100V super aluminum electrolytic

SHDR® Application Notes

What do the Q and D values of a capacitor mean and why are they important?

When doing RF, pay special attention to their Q values when choosing inductors and capacitors. What is the Q value? What does the Q value mean and why is it important?

Quality factor Q: It is a quality indicator that characterizes the ratio of energy stored in energy storage devices (such as induction coils, capacitors, etc.) and resonant circuits to the energy lost per week. The higher the Q value of a component, the better the selectivity of the circuit or network composed of that component.

or Q = reactive power/active power, or ratio of characteristic impedance to loop resistance.

The higher the Q value, the smaller the loss and the higher the efficiency;

The higher the Q value, the better the frequency stability of the resonator, and therefore the more accurate it can be.

How to Understand Q and ESR Values An important performance metric for evaluating high frequency chip capacitors is the figure of merit, Q, or the equivalent series resistance (ESR) associated with it.

In theory, a "perfect" capacitor should behave as a zero-ohm ESR, purely capacitive, non-impedance ss of frequency, the current through the capacitor leads the voltage by 90 degrees. In fact, capacitors are not perfect, more or less will have a certain ESR value. The ESR of a particular capacitor varies with frequency and is an equation.