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Fixed Inductors

Fixed inductors, also known as self-inductors or lumped inductors, have a low electrical resistance and a relatively constant inductance over a wide range of frequencies. This makes them useful for a variety of applications such as filtering, coupling, voltage regulation, and power conversion. For fixed inductors, the inductor remains unchanged, even when the frequency or the current in the circuit changes. In this article, we will discuss the M1331-123K fixed inductor and its application field and working principle.

M1331-123K

The M1331-123K is a fixed inductor manufactured and marketed by Murata Electronics North America. This inductor is formed with an air gap and features a flat body design. The core material is powdered iron and there are three types of wire available, copper, nickel-plated copper, and stainless steel. The inductance ranges from 1uH to 680uH and the rated current ranges from 200mA to 1.1Amps. The inductor has a reaction range between 30kHz and 250kHz.

Application Field

The application of the M1331-123K fixed inductor is broad and varies from power supplies, switching regulators, and DC/DC converters to audio signal filtering. It is often used in high frequency transformers, power supply circuits, and chokes for DC-DC to generate high frequency power from low frequency power sources. In addition, the M1331-123K is used in low pass filters, bandpass filters, notch filters, and high pass filters to perform signal processing tasks.

Working Principle

The working principle of the M1331-123K is based on the fact that an electric current generates a magnetic field around it. When a voltage is applied to the inductor, it creates an opposing magnetic field in the inductor and this opposing field transforms energy back to the current. This phenomenon is known as inductance and is used to measure the amount of energy the inductor can store. The inductance of the M1331-123K depends on the core material, the number of turns of the coil, and the shape of the core.

As the current passing through the inductor increases, the inductance of the M1331-123K also increases linearly. When the current changes, it will induce a voltage in the inductor. This voltage is inversely proportional to the rate of change in the current and is used to maintain the inductance regardless of the frequency of the current. So, even when the frequency of the current passing through the inductor increases, the same amount of energy is stored in the inductor.

In addition, the M1331-123K is temperature-resistant, meaning it can sustain high temperatures without losing its inductance. This ensures that it can be used in a wide variety of applications, from high frequency transformers to audio signal filtering.

Conclusion

The M1331-123K fixed inductor is a popular choice for a variety of applications. It is an inductor with a low electrical resistance and a relatively constant inductance over a wide range of frequencies. Its application field ranges from power supplies, switching regulators, and DC/DC converters to audio signal filtering. The working principle of the M1331-123K is based on inductance, which is a phenomenon where the inductor induces a voltage inversely proportional to the rate of change in the current. In addition, the M1331-123K is temperature-resistant, ensuring that it can be used in a wide variety of applications.

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