LQH43MN121K03L

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Fixed inductors are passive components that store electrical energy or block the flow of electrical energy. Examples include large scale wire-wound inductors, air core inductors, ferrite core inductors and many others. The specific type under discussion in this article is the LQH43MN121K03L inductor.

The LQH43MN121K03L inductor is a surface mount, multilayer, toroidal-wound coil. It has been designed for high-current filtering, radio frequency (RF) filtering, and high-frequency snubber applications. It is capable of operating safely in temperatures between -40°C to 125°C, and is encapsulated with a holographic epoxy resin to help aid against mechanical damage.

The core material used in the LQH43MN121K03L inductor is a high-temperature ferrite. This tonal material behaves like a magnetic material, allowing electrical current to flow through the inductor’s windings creating an electromagnetic field. The resistance will change, depending on the amount of current flowing through the windings. The higher the current, the higher the inductance.

The working principle of the LQH43MN121K03L inductor is based on the concept of ‘inductance’. Inductance is a measure of the resistance an electric current experiences when it passes through an inductor. Depending on the current, the inductor will either increase the resistance or decrease the resistance. Inductance is measured in millihenrys (mH). Therefore, the LQH43MN121K03L inductor has a range of inductance from 11.5mH to 13.5mH.

The LQH43MN121K03L is usually employed in applications where a high level of current must be filtered. This includes power supply power conversion, DC-DC charge pumps, switching regulators, rectifiers, and Class G audio amplifiers.

One example of its usage is as a high-current filter. In this application, the inductor filters out any AC signals, allowing only the desired DC signals to pass through. This is useful for powering electronics devices such as phones, as the filtering prevents interference from more powerful signals.

Another common usage of the LQH43MN121K03L is as an RF filter. In this application the inductor filters out any high-frequency signals, allowing only the desired lower frequencies to pass. This is beneficial for radio communication as it prevents the transmission of higher frequencies that would interfere with other communication signals.

The LQH43MN121K03L is also capable of being used as a snubber,which is an electronic device used in circuits to reduce transients. Transients are quick changes in voltage and current that can cause damage to other components. By properly connecting the LQH43MN121K03L to the components, it helps to reduce the magnitude of the transient voltage and keep various components safe.

In conclusion, the LQH43MN121K03L is a fixed inductor that is used primarily for filtering, RF filtering, and snubbing applications. It is a high-temperature ferrite core that works on the principle of inductance, and is capable of operating in temperatures between -40°C to 125°C. Its usage is beneficial in a variety of applications, including power supply conversion, DC-DC charge pumps, switching regulators, rectifiers, Class G audio amplifiers, and more.

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