Definition

1. Noun:
   • A type of fixed capacitor: An electrolytic capacitor is an electronic component that stores electrical energy. It is characterized by having two electrodes (a positive anode and a negative cathode) separated by an electrolyte, which acts as the dielectric material. This construction allows for a high capacitance value in a relatively small physical size.

Usage

• Electrolytic capacitors are commonly used in power supply circuits to filter and smooth voltage, in audio equipment for coupling and decoupling signals, and in many electronic devices where large capacitance values are required.

Examples

Advanced Usage

• "Polarized electrolytic capacitor": The most common type, which must be connected with the correct voltage polarity (positive to positive, negative to negative) to function correctly and avoid damage.
  • Always check the markings on a polarized electrolytic capacitor before installing it.
• "Aluminum electrolytic capacitor" / "Tantalum electrolytic capacitor": These specify the material used for the anode, with tantalum types generally being more stable and reliable but also more expensive.
  • For critical circuits, a tantalum electrolytic capacitor is often preferred over an aluminum type.

Variants and Related Words

• Capacitor (n): The general term for a component that stores electrical charge. An electrolytic capacitor is a specific subtype.
• Electrolyte (n): The conductive liquid or gel separating the electrodes in this type of capacitor.
• Supercapacitor (n): An advanced type of capacitor with extremely high capacitance, sometimes using electrochemical principles similar to but distinct from electrolytic capacitors.

Synonyms

• Polarized capacitor: A broader term that includes electrolytic types, emphasizing the polarity requirement.
• Electrochemical capacitor: A more technical term that describes the operating principle.

Related Phrases

• "To blow a capacitor" / "A capacitor has blown": A common phrase when a capacitor, often an electrolytic one, fails catastrophically, sometimes with visible damage like a bulging top or leaked fluid.
  • The loud pop meant he had blown a capacitor on the circuit board.
• "To reform a capacitor": A process of slowly applying voltage to an old or unused electrolytic capacitor to restore its dielectric layer.
  • Before using the vintage radio, it's wise to reform the electrolytic capacitors.

Noun

1. a fixed capacitor consisting of two electrodes separated by an electrolyte