SRP1238A-4R7M Inductors, Coils, Chokes

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Fixed Inductors

The SRP1238A-4R7M fixed inductor is a discrete, fixed-value inductor that is designed for a variety of applications, including high frequency switching, power factor correction, and EMI/RFI noise suppression. As a passive electrical component, fixed inductors are used to regulate electrical current and resist alternating currents. They are usually used in conjunction with other electrical components to form networks and achieve specific objectives.

Application Field

These inductors have a wide range of applications, ranging from consumer electronics to industrial equipment. Some of the most common applications include:

• Filtering: Fixed inductors can be used to attenuate certain frequencies on either the input side or the output side of electronic circuits.
• Signal conditioning: This function helps to isolate and shape electronic signals that travel through electronics.
• Noise suppression: These are essential components in designs that are intended to eliminate interference from other electronic components.
• DC-DC converters: These are used to step-down or boost voltage as needed in applications such as power supplies.
• High frequency switching: These are used to increase the efficiency of DC-to-AC power converters.

Working Principle

Fixed inductors are passive electronic components made from conducting material, such as copper, wrapped into a coil. This coil is usually shaped into a doughnut, often referred to as the "inductor core" or "inductance core." When they are subjected to an alternating current (AC), they generate a magnetic field that stores energy in a phenomenon known as inductance. In a fixed inductor, this phenomenon is used to create a fixed inductance value, which cannot be changed.

In addition to exhibiting an inductance, an inductor also presents a resistance to current known as its "inductance reactance." This reactance increases with increasing frequency and can be counteracted by adding capacitors.

When using fixed inductors, it is important to take into account their parasitic qualities. These are the parasitic capacitance and resistance associated with them. Parasitic capacitance is a term that describes how the inductor behaves like a capacitor, and can cause distortion, capacitive reactance, noise, and other issues, while parasitic resistance is the resistance that occurs due to the wire used to create the coil, and causes current to be dissipated.

Conclusion

SRP1238A-4R7M fixed inductors are designed for a variety of applications, including high frequency switching, power factor correction, and EMI/RFI noise suppression. They are used to regulate electrical current and resist alternating currents, and can also be used for filtering, signal conditioning, and DC-DC converters. Fixed inductors work on the principle of inductance, and also react with parasitic qualities such as inductive reactance and parasitic capacitance and resistance.

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