fixed capacitor
Fixed capacitors are those with a fixed capacitance value. There are also those with variable and adjustable capacitance. The group of fixed capacitors is divided into non-polarized and polarized fixed capacitors.
The non-polarized fixed capacitors, which can be connected to both DC voltage and AC voltage in any direction, include film capacitors, mica capacitors, ceramic capacitors and paper capacitors.
The polarized fixed capacitors, on the other hand, may only be used for DC voltage in a given direction. If the polarity is incorrect, the dielectric can decompose and the capacitor can be damaged. The polarized fixed capacitors include electrolytic capacitors and tantalum capacitors.
Fixed capacitors have fixed capacitance values that must not exceed the specified tolerances. They are characterized by good capacitance stability, dielectric strength, a low temperature coefficient and are used in electronic circuits for smoothing DC voltages, in analog chips, in AF, RF and microwave circuits, as protection capacitors against interference radiation and for electrical energy storage, and in many other applications. They exist as power capacitors, feedthrough capacitors, and as supercapacitors with capacitance values of several hundred farads (F).
Fixed capacitors are available for PCB mounting as SMD capacitors and for through-hole technology. They can be mounted horizontally, in which case they have axial connections, or in the more space-saving upright mounting they have radial connections.