IEC Inlet Filter | EMI Filter Wholesale Suppliers - YUNPEN EMI Filters, Power Line Filters, Noise Filters, Inlet Filters, 3-Phase Filters, Single Phase Filters YUNPEN is one of the EMI filter manufacturers in the electronic industry since 1990. EMI filters including IEC inlet filter, single phase filter, power line filter, noise filter, inlet filter, 3 phase filter, which is manufactured under strict QC / IPQC / OQC inspections. ISO 9001:2015 certified and VDE, UL, CSA and the CE safety approved, YUNPEN's EMI filter is designed with excellent noise suppression performance, compact size and suitable for household equipment, medical equipment, test and measurement equipment, datacom equipment, automation equipment.