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Fixed Inductors

An inductor is an electrical component that stores electrical energy in the form of a magnetic field. In electrical engineering, an inductor, also known as a coil, choke, or reactor, is a passive two-terminal electrical component which resists changes in electric current passing through it. Fixed inductors are fixed-value inductors with various uses such as filtering, noise suppression, impedance matching, frequency selection, or inductive reactance. Fixed inductors typically contain a fixed inductance with a low cost, low profile, and excellent electrical performance.

SDR0302-4R7ML application field and working principle

The SDR0302-4R7ML is a fixed inductor designed primarily for use in electronic circuit or power supply applications. Its inductance value is 4.7uH, and it has a current rating of 1.56amps. The SDR0302-4R7ML is a low cost, low profile, high efficiency, surface mount device. It is specifically designed for use in DC-DC converters, digital switch mode power supplies, battery charging, and other low-frequency applications. Its high efficiency and power handling capability make it suitable for high-current applications.

The SDR0302-4R7ML consists of a ferrite core with windings of copper wire. The metal case acts as the return path for the current, thus providing maximum efficiency and low profile. The winding is then enclosed in a ferrite magnetic shield to minimize any unwanted electromagnetic interference (EMI).

The SDR0302-4R7ML works by creating a magnetic field when electric current flows through the coil. The magnetic field increases with increasing current, producing a corresponding increase in the inductance of the inductor. This change in inductance has the effect of reducing the total current in the circuit. For this reason, it is used as a noise suppression device.

The SDR0302-4R7ML is also commonly used in analog circuits to filter out high frequency noise. By connecting two of these inductors in series, the total current can be effectively reduced. This is because the inductance produced by each inductor is inversely proportional to the frequency of the signal. As a result, high frequency signals are filtered out more easily than low frequency signals.

In addition, the SDR0302-4R7ML is also used for impedance matching. This is done by connecting the inductor in series or in parallel with other components in the circuit, to achieve the desired impedance.

The SDR0302-4R7ML is an excellent choice for electronic circuits or power supplies because of its low cost, low profile, and excellent electrical performance. It is designed for use in DC-DC converters, digital switch mode power supplies, battery charging, and other low-frequency applications. Its high efficiency and power handling capabilities make it suitable for high-current applications, and its inductance values make it ideal for use in analog circuits.

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