How do I choose the right common mode / EMI filter inductor for my application?

Choosing the right common mode / EMI filter inductor for your application can be a daunting task. It's important to consider various factors such as size, power rating, and frequency range.

The first step is to determine the required inductance value based on your circuit's specifications. This can be calculated using online tools or by consulting with an experienced engineer.

Next, consider the physical dimensions of the inductor and ensure that it will fit within your device's design constraints. Additionally, be sure to select an inductor with a sufficiently high current rating for your application.

When selecting a particular type of common mode / EMI Filter inductors, it is important to evaluate its attenuation characteristics across the full frequency range of interest. Some types may provide better performance for certain frequencies than others.

Don't forget about cost considerations when selecting a filter inductor. While higher-end options may offer superior performance, they may not always be necessary or budget-friendly for every application.

Selecting the right common mode / EMI filter inductor requires careful consideration of several key factors including required specs, physical dimensions, attenuation characteristics and cost considerations.

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