EMC filters: An application example

Whether in industry, medical technology or consumer electronics – switched-mode power supplies are essential components of modern power supplies. They offer high efficiency and a compact design, but come with a challenge: electromagnetic interference (EMI). This can affect neighboring devices, interfere with communication signals or even cause sensitive systems to malfunction. This can have serious consequences, particularly in safety-critical areas such as medical technology or aviation.

Strict EMC standards are in place to ensure that electronic devices do not cause any unacceptable interference or are not themselves affected by electromagnetic influences. Industrial, scientific and household devices, for example, are subject to the requirements of CISPR 11/32, while EN 55022/55032 is relevant for IT and multimedia technology. In industrial environments, the standards EC 61000-6-1 to IEC 61000-6-4 regulate both the permissible emitted interference and the required immunity to external influences.

Devices that do not meet these standards must be extensively revised or may not be placed on the market at all. An essential component of any EMC strategy is therefore an effectively designed EMC filter that reduces unwanted conducted interference and ensures compliance with the standard.

Continue reading for a practical example:

https://bkt-prenzlau.de/app/uploads/2025/05/Practical-Example.pdf