Datasheet

Aluminium Electrolytic Capacitors
3
GENERAL INFORMATION
F&T Kondensatoren GmbH has been a manufacturer of capacitors since 1948. Many years of experience,
continuous research & development and the latest state of the art production machinery guarantees products of
the highest quality.
ALUMINIUM ELECTROLYTIC CAPACITORS
-polarized capacitors
general industrial
inverter
telecommunications
switch mode power supplies
photovoltaic
wind power plants
medical
smoothing and filtering
welding and photo flash applications
-non polarized capacitors
audio - video applications
charging capacitors for photo flash capacitor banks
single phase motor starting
1. Construction of Aluminium Electrolytic Capacitors
High gain etched anode foil with the thick oxide layer, which is produced by the forming-process, is shown at the top of
figure 2. The cathode foil with a much thinner oxide layer is arranged at the bottom. Layers of papers are seperating both
foils. The electrolyte fills up the pores of the aluminium foils and thus builds either the one electrode of the anode or
cathode capacitance. The dielectric consists of the oxide layers of the anode foil respectively the cathode foil. This
construction builds two capacitances: the anode and the cathode capacitances. Because of the thicker oxide layer the
anode capacitance is normally much smaller than the cathode capacitance.
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Fig. 1 shows the construction of a typical electrolytic capacitor
1 terminal
2 aluminium can
3 insulation
4 bottom insulation
5 deck
6 sealing
7 safety vent
8 tab foil
9 winding
2
4
3
1
5
6
7
8
9
Fig. 1
Fig. 2Fi1
Fig. 3