IR04BH391J

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A fixed inductor, such as the IR04BH391J, is an electronic component that stores energy in the form of a magnetic field. The inductor consists of two windings: a primary coil and a secondary coil. The primary coil is connected to an AC source of voltage, while the secondary coil is connected to a load. When an alternating current passes through the primary winding, a magnetic field is generated in the secondary coil, which stores energy. Furthermore, the current passing through the primary coil also induces a current in the secondarycoil.

The IR04BH391J is an axial-lead fixed inductor designed to be used in medium-power applications such as DC-DC converters, filtering, and radio-frequency (RF) circuits. It is rated for an inductance of 391 µH, saturation current of 4 A, and resistance of 0.095 Ohms, with a peak operating temperature of +105 °C. The inductor is packaged in a wide-line axial-lead form factor, which enables its use in a variety of mounting configurations.

The IR04BH391J features high efficiency and durability, as well as excellent shielding performance. The inductor’s magnetic shield ensures that the circuit’s magnetic fields remain within the device, thus minimizing the interference and crosstalk between other components in the circuit. The device has a reliable temperature-varying inductance curve, which reduces power losses due to core saturation. Moreover, its long leads ensure the inductor is tightly coupled to its neighboring components, providing superior performance in high-frequency circuits.

The IR04BH391J is commonly used in DC-DC converters, as the inductor provides a consistent current for the circuit, preventing oscillations that might otherwise result in instability. The component’s magnetic shield also ensures the system remains free of noise and interference from nearby circuits. The inductor is often used in conjunction with a high-Q resonant circuit, allowing it to achieve maximum efficiency. Likewise, since the device has a low DC resistance, it can be used in high-power applications, such as Class-D amplifiers.

The working principle of the IR04BH391J is based on Faraday’s Law of Induction. This law states that when a current-carrying conductor experiences a changing magnetic field, an electric field is induced in the conductor. This phenomenon is known as electromagnetic induction, and is the basis for the operation of the IR04BH391J. When an alternating current passes through the primary winding, a magnetic field is generated, which in turn induces a current in the secondary winding. The magnitude of the induced current is proportional to the strength of the field and the frequency of the current.

In conclusion, the IR04BH391J is a fixed inductor that is used for medium-power applications in DC-DC converters, Class-D amplifiers, and RF circuits. It has a rated inductance of 391 µH, saturation current of 4 A, and resistance of 0.095 Ohms, with a peak operating temperature of +105 °C. The inductor features high efficiency and durability, excellent shielding performance, and reliable temperature-varying inductance curve. Its working principle is based on Faraday’s Law of Induction, where an alternating current supplied to the primary winding generates a magnetic field that induces a current in the secondary winding.

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