Polymer Capacitors

Some articles on capacitor, capacitors:

Equivalent Series Resistance - Component Models - Capacitors
... In a non-electrolytic capacitor the metallic resistance of the leads and electrodes and losses in the dielectric cause the ESR ... Typically quoted values of ESR for ceramic capacitors are between 0.01 and 0.1 ohms ... ESR of non-electrolytic capacitors tends to be fairly stable over time for most purposes real non-electrolytic capacitors can be treated as ideal components ...