PM20-820K

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Fixed Inductors encompass a series of inductive elements that have values fixed after manufacture, as the name suggests. There is a vast array of fixed inductors and in this article, we will focus on the PM20-820K.

PM20-820K is a self-shielded wire-wound surface mount inductor. This type of inductor is suitable for a wide range of applications, from mobile phones to computers and is particularly efficient in power line infiltration suppression, motor control circuits and radiation filters, among other applications. It provides a relatively large inductance value with a high current rating and is perfectly suited for power line filter in switching power supplies and converters as well as EMI/RFI avoidance.

Let’s take a look at the construction of the PM20-820K. The core of the inductor is composed of an internal wire-wound construction and a ferrite core. This construction allows it to have a great current-handling ability and excellent electric characteristic. The exterior is composed of a thermoplastic housing which contains an internal wire-wound construction and a ferrite core. The thermoplastic provides added protection against mechanical shock while also providing resistance against a wide variety of harsh environmental conditions. The PM20-820K also includes a low impedance that is suitable to filter out high frequency noises.

Now let’s look at the principle of operation for the PM20-820K. When a DC current is applied to the inductor, the current creates a magnetic field. This field induces a voltage in the inductor. The magnitude of the voltage induced in the inductor depends on the size of the magnetic field, the number of turns in the Coil, and the rate of change of the current. The inductive reactance or impedance of the inductor restricts the flow of current through it, and this impedance increases as the frequency increases. This increase in impedance is the basis for the filtering effect of the PM20-820K inductor.

In summary, the PM20-820K is a fixed inductor and includes a low impedance that is suitable to filter out high frequency noises. It also has a construction composed of an internal wire-wound construction and a ferrite core and includes a thermoplastic housing for added protection and resistance against environmental conditions. Its principle of operation is based on the magnetic field that is created when a DC current is applied to the inductor which induces a voltage in the inductor. This voltage causes an increase in impedance which is the basis of the filtering effect of the PM20-820K inductor.

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