IR02ST1R8K

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Fixed Inductors

An electrical component called a “fixed inductor” is used in a variety of electronic applications. It is a two-terminal device, often just referred to as an “inductor," that is used to provide a stable current and is found in almost any electrical circuit. In a basic form, this component consists of a coil of wire that is wound around a piece of ferrite core, and it works by strongly influencing current as it passes through it.

IR02ST1R8K Application Field and Working Principle

The IR02ST1R8K is a surface-mount, general-purpose fixed inductor. It is rated at 10µH, which is a measure of its inductance, with an operating temperature range of – 55°C to + 120°C. It is designed for use in high-frequency power supplies and in wideband RF applications. It is widely used in computer electronics, automotive electronics, and uninterruptible power supplies (UPS).

The working principle of this inductor is based on the operation of a closed current loop found in an electric circuit. The loop consists of a wire winding around a ferrite core, with one end connected to a voltage source and the other connected to a current source. When an alternating current (AC) is passed through the loop, a magnetic field is created within the loop and a counter-emf is generated. This counter-emf acts against the AC current, causing a decrease in the total current flowing through the loop.

The magnitude of the counter-emf generated will depend on several factors, including the size and shape of the ferrite core and the number of windings around it. The value of the counter-emf can be controlled by choosing the right size and shape of the core and adjusting the number of windings. By controlling the counter-emf, the overall impedance of the inductor can be changed, which is what allows it to be used for a variety of applications.

The inductor can also be used in circuit resonators to filter out certain frequencies and in electromagnetic interference (EMI) filters to reduce the level of interference between two or more electrical devices, such as a machine and a computer. The inductor can also be used to create a delay in the AC current, which is why it is often used in high-frequency power supplies.

In summary, a fixed inductor is an essential component in many electronic devices. The IR02ST1R8K is an example of a widely used general-purpose inductor, which is ideal for use in high-frequency power supplies and in wideband RF applications. It works on the principle of a closed current loop, in which a magnetic field is created and a counter-emf is generated, controlling the total current flowing through the loop and allowing it to be used for various applications.

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