ETQ-P8M4R7JFA Inductors, Coils, Chokes

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Fixed Inductors

An inductor, which is often called a reactor, is a component in an electrical circuit used to store energy in the form of a magnetic field. It can also be used to reject AC interference from another circuit. The ETQ-P8M4R7JFA is a fixed inductor with a rated current of 8mA and a rated inductance of 0.4Ωr;. It has an operating temperature range of -40°C to +85°C and a maximum DC rated current of 2 Amps.

Application Field

The ETQ-P8M4R7JFA fixed inductor is commonly used in DC-to-AC inverters, DC-to-DC converters, switching power supplies, motor drives, power amplifiers, automobiles, communications equipment, computers, and solar panel systems. It can also be used to filter AC noise and reduce EMI (electromagnetic interference) caused by high-speed switching. Its low DC resistance and high tolerance to temperature result in low power losses and a longer lifespan.

Working Principle

An inductor works off the principle that a magnetic field will be generated whenever a current passes through a wire. This magnetic field will then induce a voltage into the same wire. This induces voltage is in opposition to the original current, creating a self-inductance effect that limits the current flow. In the case of the ETQ-P8M4R7JFA fixed inductor, this effect is modulated so as to make sure that current only flows in one direction with minimal losses. This is achieved by winding the wire in loops around a ferrite core thus creating a stronger magnetic field. The stronger the magnetic field, the greater the inductance and the less current flowing through the wire.

In addition to providing a linear current path, the presence of the ferrite core results in a higher saturation current meaning that more current can be allowed to pass through the inductor without it getting damaged. The inductor also has an electrolytic capacitor connected in parallel with the inductor as a protective measure. This acts to reduce the supply of high-frequency signals and limits the current in the downstream circuit.

Overall, the ETQ-P8M4R7JFA fixed inductor is a reliable and effective component for a range of different applications, from automobiles to solar panels. It is able to provide a linear current path and reduce EMI, while limiting the current to acceptable levels and maintaining a consistent operating temperature. Despite its small size, its performance is remarkable and its use in power electronics applications is highly recommended.

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