Electrical components

thumb|MOSFET|Metal–oxide–semiconductor field-effect transistor (MOSFET), showing gate (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (white).

A capacitor is a device that stores electrical energy by accumulating electric charges on two closely spaced surfaces that are insulated from each other. It is a passive electronic component with two terminals. A capacitor was originally known as a condenser, a term still encountered in a few compound names, such as the condenser microphone. Colloquially, a capacitor may be called a cap.

thumb|upright=1.2|right|Various resistor types of different shapes and sizes

device that controls electric current between electrodes in an evacuated container

any device that produces light from electricity

electrical safety device

thumb|upright=1.4|Electrical switches. Top, left to right: circuit breaker, mercury switch, wafer switch, [[DIP switch, surface mount switch, reed switch. Bottom, left to right: wall switch (U.S. style), miniature toggle switch, in‑line switch, push-button switch, rocker switch, microswitch.]]

basic discrete device or physical entity in an electronic system used to affect electrons or their associated fields

thumb|upright|Metal-oxide varistor manufactured by Siemens & Halske AG. thumb|Modern varistor schematic symbol, which is the same as a thermistor symbol

rotary electrical switch that periodically reverses the current direction between the rotor and the external circuit

A memristor (; a portmanteau of memory resistor) is a non-linear two-terminal electrical component relating electric charge and magnetic flux linkage. It was described and named in 1971 by Leon Chua, completing a theoretical quartet of fundamental electrical components which also comprises the resistor, capacitor and inductor.

class=skin-invert-image|thumb|right|Schematic diagram of an opto-isolator showing source of light (LED) on the left, dielectric barrier in the center, and sensor (phototransistor) on the right

thumb|An example of a waveguide: A section of flexible rectangular waveguide used for radar that has a flange.

right|thumb|This mains power plug travel adapter allows British plugs to be connected to American or Australian sockets.

A buzzer or beeper is an audio signaling device, which may be mechanical, electromechanical, or piezoelectric (piezo for short). Typical uses of buzzers and beepers include alarm devices, timers, train and confirmation of user input such as a mouse click or keystroke.

indicator for the values or ratings of electronic components, very commonly for resistors

A thermopile or a thermoelectric pile is a device that converts thermal energy into electrical energy. It is composed of several thermocouples connected usually in series or, less commonly, in parallel. Such a device works on the principle of the thermoelectric effect, i.e., generating a voltage when its dissimilar metals (thermocouples) are exposed to a temperature difference.

mechanical bell that functions by means of an electromagnet

converts electricity into heat through the process of resistive or Joule heating

connection point in electronic circuits

part of a component that reversibly forms an electrical connection

connecting wire or pad within an electronic device; electrical connection consisting of a length of rigid wire or metal pad (SMD) that comes from a device

arrangement of electrodes in a gas within an insulating, temperature-resistant envelope

standardized sequence of property values ​​of electrical components

piece of equipment that distributes electric power

Ink that conducts electricity

thumb|Memistor

right|170px|thumb|Nullator electronic symbol In electronics, a nullator is a theoretical linear, time-invariant one-port defined as having zero current and voltage across its terminals. Nullators are strange in the sense that they simultaneously have properties of both a short (zero voltage) and an open circuit (zero current). They are neither current nor voltage sources, yet both at the same time.

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component or a circuit that functions as a current-stable nonlinear resistor

device to protect electrical equipment from over-voltage transients

optoelectronic temperature sensing device

right|200px|thumb|Nullor electronic symbol (balanced version) right|200px|thumb|Nullor electronic symbol (unbalanced version)

right|170px|thumb|Norator electronic symbol In electronics, a norator is a theoretical linear, time-invariant one-port which can have an arbitrary current and voltage between its terminals. A norator represents a controlled voltage or current source with infinite gain.

electromechanical system for controlling events

system of identifying electrical power devices

European type designation and registration system for active electronic components

class of fuses used to protect the wiring and electrical equipment for vehicles

rotating control mechanism

Opto-isolator with a photo resistor as optical receiver