kondensador

A kondensador is an electronic component that stores electrical energy in an electric field. It is composed of two conductors separated by an insulating material called a dielectric, which may be air, ceramic, glass, plastic, paper, mica or a liquid solution. When a voltage is applied across the conductors, positive and negative charges accumulate on opposite plates, creating a potential difference that maintains the electric field. The amount of charge a kondensador can store is proportional to its capacitance, measured in farads (F). The basic relation is Q = C · V, where Q is the charge, C is the capacitance and V is the voltage.

Capacitances of practical devices range from picofarads (10⁻¹² F) in integrated circuits to many microfarads (10⁻⁶ F) in power supplies, and even tens of farads in specialized high‑voltage applications such as industrial power conditioning or energy storage. The equivalent series resistance (ESR) and equivalent series inductance (ESL) are critical parameters in high‑frequency and power applications because they determine the energy losses and the ability to respond to rapid changes in voltage or current.

Kondensadores occur in many forms. Ceramic, tantalum, electrolytic, film and supercapacitor (ultracapacitor) types differ in dielectric material, voltage rating, temperature stability and physical size. Supercapacitors, for example, have can store several kilojoules and are used in regenerative braking systems and backup power for servers.

The principles underlying a kondensador were first described by scientists such as Richard‑Adrian, John Henry Cox and John Ambrose Fleming in the late 19th century. Their experiments demonstrated that an insulating layer between conductors could prevent direct conduction while enabling charge accumulation, which led to the modern concepts of capacitance and electric energy storage.

In modern electronics, kondensadores are used for filtering, decoupling, timing, energy storage, coupling, and signal processing. Their small size and low cost allow them to be integrated into nearly every electrical device, from radios and televisions to electric vehicles and portable computing equipment.