This whitepaper discusses the EMC compliance of Switching Power Supplies (SPS) as component power supplies. It explains that EMC testing must be conducted within the end system, as per the EMC Directive 2014/30/EU, which primarily applies to products intended for end users. Although component power supplies like MEAN WELL's enclosed and open frame types are typically excluded from this directive, they are still designed to meet EMC requirements to ensure the end system's compliance.