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Fixed Inductors - 4470-46G application field and working principle

Fixed inductors, also known as chokes, are electronic components with a coil of wire wrapped around a core. This inductor typically consists of a coil of wire wound around either a ferrite core or air core. It is essentially an electrical element that stores energy in a magnetic field when ever a current is passed through it. The fixed inductor, 4470–46G, is a high-performance, high-frequency common mode inductor designed for EMI suppression applications.

Application Field of 4470-46G

The 4470-46G fixed inductor is primarily used in power supplies, amplifiers, and other types of signal-processing devices in general electronic fields. Common mode inductors are especially useful in suppressing electro-magnetic interference (EMI) noise. They are commonly used in data and communications applications, including Ethernet, high-speed digital, and cellular communications. They can also be used in power supplies, low-voltage power conversion, and automotive power electronics.

Working Principle of 4470-46G

When an AC signal is applied to the two windings of a fixed inductor, the induced current occurs in the same direction in both windings. This is known as the “common mode”. The 4470–46G fixed inductor utilizes this characteristic to suppress EMI noise and help reduce interference. It is a low-profile component that enables high-density mounting. The element consists of an iron-powder core and two ceramic plates. The plates are connected to the two windings, which together form a low-profile, low-resistance, magnetic loop. By applying an AC signal to the two windings, an opposing voltage is created, and this induces a current in the same direction, resulting in suppression of EMI noise.

Conclusion

The 4470–46G fixed inductor is an essential component for EMI suppression applications. It has a low profile that enables high-density mounting, helping reduce the size and cost of EMI suppression components. The two ceramic plates are connected to the two windings, forming a low-profile, magnetic loop to induce current in the same direction, therefore suppressing EMI noise.

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