ULTRACAPACITOR / SUPERCAP, 16V 83F MODULE
(1) The low impedance of the farad capacitor is essential for many high power applications today. For fast charge and discharge, a small ESR of a farad capacitor means a greater power output.
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The maximum capacitance that these capacitors can provide is 1 Farad. If the higher capacitance is required, the capacitors will need to be quite large, which may or may not fit into typical electronic circuits. Enter the supercapacitor.
The internal resistance (ESR) of the capacitor depends upon the electrolyte. The lower the resistance offered by the electrolyte, the greater is the power density of the capacitor. Supercapacitors generally have a very low voltage rating that may range from 1V to 3V. The following equation gives the electrical power stored by a supercapacitor:
The use of activated carbon as electrodes and a minimum distance between electrodes enable these capacitors to store a vast amount of charge in small size. Supercapacitors are constructed somewhat like electrolyte capacitors. They have two electrodes that are made up of porous active carbon coating or carbon nanotubes.
In supercapacitors, the electrolyte does not serve as a dielectric. It only supplies charge carriers to the electrodes. Instead, the charge is stored by the accumulation of opposite charge carriers on electrodes.
(1) The low impedance of the farad capacitor is essential for many high power applications today. For fast charge and discharge, a small ESR of a farad capacitor means a greater power output.
Farad explains that "Super capacitors combine a very high capacitance with high pulse power capability and low ESR values. In short they act like batteries without their disadvantages".
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Mouser offers inventory, pricing, & datasheets for 500 F Supercapacitors / Ultracapacitors.
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