This article explains IEC socket power filters, key EMC components that clean power by suppressing line‑borne electromagnetic and radio‑frequency noise with inductors and capacitors. It describes their working principle of common‑mode and differential‑mode noise suppression, standardized IEC modular design and critical performance parameters. The paper covers typical uses in industrial control, medical equipment and consumer electronics. It also points out the industry development trend: filters are becoming smaller and achieving better high‑frequency performance by adopting new magnetic and capacitor materials.

This article introduces VIIP household‑appliance power filters. It analyses sources and hazards of electromagnetic interference in home circuits, explains the working principle of LC power filters, and presents their practical performance for audio‑visual devices, inverter home appliances and smart‑home systems. Guidelines for model selection, installation and routine maintenance are also provided. As cost‑effective power‑protection components, power filters suppress grid noise, reduce equipment failures and deliver reliable power guarantee for modern smart homes.