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Etymology of Fixed Inductors

The term inductor comes from the Latin ‘induco’, meaning ‘to bring in’. This is appropriate since inductors are passive components, designed to bring current, voltage, or energy into a circuit. During the 20th century, fixed inductors became commonplace in electrical products. These components take on a variety of shapes, sizes, and designations, but they are all utilized to provide common inductive properties to circuitry.

Definition of Fixed Inductors

Fixed inductors are electrical components designed to maintain a certain amount of inductance, regardless of the current passing through them. Generally composed of windings of copper wire, these components are usually found in alternating current circuits, and can take many forms. Fixed inductors are often used to filter out certain frequencies and attenuate signals, as well as pass a static magnetic field through the component.

CDH37D10SLDNP-470MC

As one of the many fixed inductors in the marketplace today, the CDH37D10SLDNP-470MC is a common choice for AC applications. This particular inductor has common design elements, but with a unique construction. The significant features of the CDH37D10SLDNP-470MC include a maximum inductance of 47 microhenries, an inductance tolerance of 10%, a self-resonant frequency of 1.3 MegaHertz, and a Low Frequency Inductance Rise of 0.5%. This component also features a coil inner diameter of 0.383”, an overall height of 0.72”, and a weight of 2.14 ounces.

Application Field and Working Principle of CDH37D10SLDNP-470MC

The primary applications for the CDH37D10SLDNP-470MC fixed inductor are radio frequency (RF) and alternating current (AC). This inductor can be used in both low-power (LP) and high-power (HP) circuits, and can be utilized to filter, attenuate, couple, and amplify signals. It also functions as a resonator, providing a wide frequency response for circuit boards.

The working principle for the CDH37D10SLDNP-470MC is similar to other fixed inductors. As alternating current runs through the component, a magnetic field is created, which can be harnessed to induce a current in the surrounding circuits. At the same time, the inductor will reduce the flow of current, as well as reduce the voltage drop along its length. This will ultimately result in a more consistent signal quality and level.

Other Types of Fixed Inductors

Fixed inductors come in many varieties, ranging from smaller board-level components to full-sized, industrial-grade components. Common examples include multi-layer, chip, wire-wound, and air-core inductors. Multi-layer inductors are often used in digital circuits, due to their small size and high-speed response. Chip inductors are suited for use in applications requiring high levels of frequency stability, commonly found in high-frequency systems. Wire-wound inductors are large components typically used in industrial settings, and designed to provide voltage conversion and power regulation.

Air-core inductors don’t rely on an iron core for inductance, opting instead for ferrite or ceramic of the same size. This type of inductor is used for applications involving high frequencies and where added field saturation is not desired. Other types of inductors also feature specialty secondaries, such as tapped or shielded inductors.

Conclusion

Fixed inductors are invaluable components for circuitry, used in a variety of applications ranging from board-level to industrial solutions. The CDH37D10SLDNP-470MC is a typical example of a classic, AC-capable fixed inductor, utilizing many common features to provide inductive properties in the circuits it powers. By understanding the various components of a fixed inductor, as well as other types of inductors, designers can ensure the best solution for their specific circuitboard requirements.

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