Siemens 1P6SN1111-0AA01-1CA1 Electromagnetic Interference Filter

Siemens 6SN1111-0AA01-1CA1 is a dedicated EMI filter for Siemens drive systems, designed to act as a mains‑input RFI/EFI/EMI noise filter that suppresses high‑frequency conducted interference and helps satisfy EMC requirements. Retail listings identify this exact model as an RFI/EFI/EMI Noise Filter and place it within Siemens' 6SN1111 family of drive accessories, underscoring its role as an external line filter for industrial drives. In typical applications, it is installed in control panels to protect drives and other equipment from EMI on the power supply, especially near variable‑speed drives and servo systems, with proper cabling practices (e.g., shielding where recommended). Siemens EMC guidance describes line filters as devices that limit conducted interference in industrial drive systems, commonly addressing the 150 kHz to 30 MHz spectrum, and this family of filters is intended to help achieve those limits. This part is presented as a genuine Siemens replacement component for drive assemblies, and is identified by its part number 6SN1111-0AA01-1CA1 on distributor sites.