0819R-10K

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Fixed inductors, the most basic of all inductor types, are widely used in electronic and telecommunications applications for the purpose of storing energy in a magnetic field, filtering and buffering reactive loads, and providing mutual inductance to link circuits together. They are also known as lumped-element inductors, or simply inductors. The term “fixed” indicates that the inductance is primarily determined by the construction of the inductor, not adjustable or tunable in operation.

The 0819R-10K application field of a fixed inductor typically ranges from low-frequency AC to high-frequency signals, such as radio frequencies. They are commonly used as simple reactive elements in filter networks, in combination with either capacitors or resistors to create band-pass, band-stop, or other filters. These components are available in both through-hole and surface-mount packages, and are individually marked with their rated inductance values.

The working principle of a fixed inductor is based on Faraday’s Law of Electromagnetic Induction, which states that an electric field will be generated when a changing magnetic field is present. When current flows through a coil or wire, a varying magnetic field is created which induces a voltage in the coil itself. This voltage will be proportional to the rate of change of the current. This is why inductors are used in circuits to oppose or limit the rate of current change.

The inductance of a fixed inductor is determined by the construction of the inductor, specifically the number of turns, cross-sectional area of the coil, and the type of core material used. This value is usually indicated in the form of a mark, letter, or number on the component itself. Different types of core materials, such as air, ferrite, and powder, can all be used, each offering different characteristics.

In addition to their main function of storing energy in a magnetic field, fixed inductors can also be used to to provide other effects such as transforming voltage and current values, providing DC isolation, decoupling, and helping to protect circuits from high frequency interference. They are also often part of simple oscillator circuits either as part of the ‘dynamic’ or ‘tuned’ components.

Fixed inductors are durable, relatively inexpensive components, and offer wide versatility in circuit designs across many applications. For these reasons, they are some of the most commonly used components in electronics systems.

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