18R473C

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Fixed inductors are widely used in electronic and electrical circuits, in particular for their ability to store and conduct current. The 18R473C is an example of a fixed inductor that consists of a ferromagnetic core wrapped with a wire coil. The ferromagnetic core provides the inductor with its inductance value, while the wire coil is responsible for providing a return path for the current. The 18R473C is typically used to filter out noise and unwanted high frequency signals in power supplies and electronic equipment, as well as to reduce power consumption in motor drives.

The 18R473C has a value of 18R, meaning that its inductance value is 18 ohms. It also has a 4700mH inductance, making it suitable for use in environments where high frequency signals are present, such as in high speed data systems or in radio and telecommunication applications. The 3C indicates that the working voltage of the inductor is 3V, meaning that it is best suited for low voltage applications. The 18R473C has a maximum voltage of 1.3V and a maximum ripple current of 5A.

In terms of working principle, the 18R473C functions like any other inductor. When a current passes through the wire coil, a magnetic field is created due to the inductor\'s ferromagnetic core. This magnetic field then operates to produce an opposing force that resists the current from changing, causing the current to "lag" behind the source voltage. This "inductive reactance" keeps the current from changing too quickly, thus allowing frequency signals to be filtered and power consumption to be reduced.

When the voltage is switched off, the magnetic field collapses and the current instantly reverses, resulting in a high inrush current spike. This spike can cause damage to the inductor if it exceeds the stated maximum voltage. To avoid this, the 18R473C is usually used in conjunction with other components, such as snubber capacitors or RC filters. These components reduce the inrush current and thus protect the inductor from damage.

The 18R473C is a versatile and widely used fixed inductor, due to its ability to store and conduct current, its low voltage operation, and its ability to filter out unwanted high frequency noise. It is suitable for a variety of applications, including power supplies, motor drives, and radio and telecommunication systems. When using the 18R473C, it is important to choose the correct components to ensure that the inductor operates safely and correctly.

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