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An electrolytic capacitor is a type of capacitor that uses an electrolyte to accomplish a higher capacitance than other types of capacitors. An electrolyte is a liquid or gel containing a high concentration of ions. Almost all electrolytic capacitors are polarized, which means that the voltage on the positive terminal must always be greater than the voltage on the negative terminal. It can provide the same level of low-frequency electric current capacity if no rechargeable batteries are available. Moreover, an electrolytic capacitor is typically used when a large amount of charge must be stored in a limited amount of space.

Type of Electrolytic Capacitors

  • Aluminum Electrolytic Capacitors
  • Non-electrolytic Capacitors
  • Tantalum Electrolytic Capacitors
  • Niobium Oxide- Electrolytic Capacitor

Uses of Electrolytic Capacitors

  • Used to reduce voltage fluctuations in various filtering devices.
  • Used in output and input smoothing to filter when the DC signal is weak with the AC component.
  • They are extensively used for noise filtering or decoupling in power supplies.
  • They are used for coupling signals between amplifier stages and also to store energy in flashlamps.