Information

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Design and specifi cations are subject to change without notice. Ask factory for technical specifi cations before purchase and/or use.
Whenever a doubt about safety arises from this product, please contact us immediately for technical consultation.
Gold Capacitors Technical Guide
Principles and Operation of Gold Capacitors
We have also products available that have greater capacitance to comply with the following requirements:
• For loading a large amount of current in a short time, (e.g. solenoid absorption of hot-water gas heaters and
protection of HDD head requesting several mA to several 100mA of current.
• Load for lighting equipment.
A cross-sectional drawing of a coin shaped single
cell Gold Capacitor is shown in Fig.2.
The electrode within the cell is made from activated
carbon. The electrode is then impregnated with
an electrolyte. A separator with high insulating
properties against ion penetration is then positioned
between both electrodes to prevent short circuiting.
Then packing is added between the top cover and
bottom case to seal.
Negative and positive electric charges are then
formed between the solid activated carbon fi bers
and the liquid electrolyte. The boundary area
The electric double layer acts as an insulator and does not allow current to fl ow when an external DC voltage is
applied. As the voltage level is increased, a point is reached where the current will begin to fl ow. The magnitude
of this voltage is called the “decomposition voltage”. Further increasing this voltage will cause the electrolyte to
decompose causing additional current to fl ow.
The withstand voltage of a Gold Capacitor is determined by the decomposition voltage and varies by number of
capacitors used in series.
Gold capacitors use an activated carbon electrode and an organic electrolyte. The electric double layer is very thin,
like a molecule, and the electrode uses a large surface activated carbon, allowing a high capacitance (in farads) to
be attained. The withstand voltage per single cell is also high and the product can be miniaturized because it uses
organic electrolytes.
2-2 Construction and Principles of Operation
between these charges is the electric double layer. This can be seen in Fig.3. The area increases as higher voltages are
applied. The higher voltage increases the charge as shown in Fig.4.