Automotive Common Mode Filters & Chokes TDK Automotive Common Mode Filters and Chokes are suitable for use in high-speed signal and power line applications, including automotive bus systems such as CAN, FlexRay, and Ethernet. These common mode chokes are designed especially for fully-automated manufacturing processes. To meet the need for high-density packaging, TDK constantly strives to reduce the overall size and profile of products by putting their advanced material and multilayer processing technologies to full use.