1812-220K

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Fixed inductors, also known as chokes, coils, or reactors, are electrical components typically composed of wire coils wrapped around a core made of ferrite or other material. 1812-220K fixed inductors are mainly used as RF inductors in power circuits, commonly used for filtering, coupling, decoupling, and impedance matching between different circuits. 

The 1812-220K fixed inductor has a power rating of 1W, with a self-resonant frequency of 1.2MHz and an operating frequency range of 15kHz to 5MHz. It\'s size is 1812, with a tolerance of 20%, and an approximate inductance of 220K.

The basic principle behind fixed inductors is induction. An alternating current from the source is used to construct a magnetic field around the inductor. When two magnetic fields intersect or interact, an EMF is induced in the inductor. This EMF is used to cause a current to flow in the inductor, and is used to modify the voltage or frequency of the original signal.

The 1812-220K fixed inductor uses a ferrite core, which is much easier to design than the conventional air core. This core material increases the inductance, improves the saturation current and temperature stability, and reduces the resistance and capacitance to achieve better linearity. This increases the efficiency of the inductor, allowing more current to flow, and allowing a stronger magnetic field to be created.

The 1812-220K also makes use of copper wire to wind the inductor. Copper is an excellent conductor, meaning that it maintains its conductivity even at higher temperatures. Copper also has low resistive losses, resulting in more reliable operation and lower power consumption. Finally, copper can also handle higher switching frequencies, which allows for higher performance in high frequency applications.

In summary, the 1812-220K fixed inductor is mainly used in RF power circuits for filtering, coupling, decoupling, and impedance matching between different circuits. It is constructed from a ferrite core and copper wires, which increase its efficiency, stability, and performance. The inductor\'s power rating is 1W, with a self-resonant frequency of 1.2MHz and an operating frequency range of 15kHz to 5MHz, and it has an approximate inductance of 220K.

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