Capacitor: what it means.
A capacitor stores charge using separated conducting surfaces and an insulating region between them. Its capacitance describes the relationship between stored charge and voltage. In circuits, capacitors help shape changing signals and can store or release electrical energy. (Analog Devices: electronics terminology)
A capacitance value is not a complete component specification. For a practical design, separately identify the allowable voltage, tolerance, construction and operating conditions. The circuit role matters as much as the nominal number printed in a parts list. (Analog Devices: electronics terminology)
Put the definition to work.
Capacitors appear in filtering and signal-coupling circuits. When reading an IC application circuit, distinguish capacitors built into the IC from the separate capacitors shown around it. (Hybrid Electronics glossary)
Questions to ask next.
Use these questions as a reading checklist, not as a device-selection recommendation. Exact manufacturer documentation takes priority over a general definition.
- Capacitance and tolerance
- Voltage and polarity requirements
- Construction and operating environment
For the broader explanation, explore the complete integrated circuits guide. This page defines the term; the companion guide connects it to the rest of the system.
Common Capacitor questions.
Is a capacitor the same as a battery?
No. A capacitor stores charge through an electric field, whereas a battery relies on electrochemical processes. Both can store energy, but their operating behavior and uses are different. (Analog Devices: electronics terminology)