How to select the main power supply filter for a PAC (Power Controller Acoustic Control Unit) to address crosstalk in its logic circuits?

When selecting the main power filter for a PAC (Power Supply Controller), rated voltage and current, insertion loss, safety certifications, and environmental adaptability must be considered comprehensively. For a 220VAC/50Hz input, first determine the operating current (e.g., 10A), and select a filter with a rated current of 15A or higher to ensure a margin. The insertion loss must meet EN55032 Class standards. Requirement A specifies a minimum 40dB attenuation in the 150kHz-30MHz frequency band. An integrated filter with a built-in CMZ7060A-701T common-mode inductor (700μH) and X2/Y2 safety capacitors is recommended, along with a 7D820K varistor in parallel for surge protection. For a 24VDC input, a two-stage filter module based on a PBZ3216E120Z0T ferrite bead and a PWRA6045 power inductor can be selected. When selecting a filter, the temperature drift characteristics from -40°C to 85°C should also be considered to ensure performance degradation is less than 20% across the entire temperature range. Verified through IEC61000-4-5 surge testing, this selection scheme can reduce conducted interference by more than 35dB, meeting industrial level 4 protection requirements.