Esr of non electrolytic capacitors tends to be fairly stable over time. The esr rating of a capacitor is a rating of quality. Capacitor Esr Table Buying A Capacitor Tester Esr Meter Dick Smith Esr Capacitor Tester Or Meter Can Help To Test Forum For Electronics It would have no in phase ac resistance. Esr values for capacitors . Typically quoted values of esr for ceramic capacitors are between 001 and 01 ohms. Also the use of tantalum capacitors on the output is just a recommendation. Not only esr values but also the impedance frequency characteristics and other characteristic data can be confirmed. Esr or the equivalent series resistance of the capacitor its df or dissipation factor loss tangent and q or quality factor are all important factors in the specification of any capacitor. Some capacitors are designed specifically for low esr but ma...