TDK Corporation announces the new ACT1210E Series (3.2×2.5×2.5mm) common mode filter for automotive Ethernet 10BASE-T1S. Mass production of this new common mode filter began in February 2023.

This product is the industry’s first common mode filter for automotive Ethernet 10BASE-T1S. It adopts TDK’s proprietary wire winding structure and optimal materials. Thus, this product achieves the industry’s best high S-parameters (Scattering parameters) and a maximum line-to-line capacitance of 10pF. The operating temperature range is from -40 to +125°C. Moreover, the laser welding winding wires to the metalizing terminals provide high thermal shock resistance and outstanding reliability.

Shifting to Ethernet Standards

More recently, the attention being paid to the autonomous driving of automobiles is increasing. Thus, the installation of electronic control units (ECUs) relating to safety functions, including those for advanced driver-assistance systems (ADAS) is increasing as well. Among the Ethernet telecommunication standards, 10BASE-T1S is unique in its support of multidrop topologies. Specifically, it enables multiple ECUs to be connected. In this respect, it differs from 100BASE-T1 and 1000BASE-T1, which support Peer-to-Peer telecommunication only.

Nowadays, more and more customers are considering shifting from the CAN, CAN FD, and Flex-Ray standards, which are commonly used because they support multidrop connections, to Ethernet systems to achieve a uniformity of standards. The new product demonstrates its characteristics are suited to these needs. Also, it contributes to improving the quality of telecommunication and suppressing noise.

TDK offers an extensive lineup of common mode filters for automotive applications. Its portfolio includes filters compliant with the current mainstream CAN, CAN FD, and Flex-Ray protocols as well as filters compliant with Ethernet protocols, such as 100BASE-T1 and 1000BASE-T1 for telecommunication speeds of 100 Mbps and 1 Gbps respectively.

Moving forward, TDK will continue catering to the needs of customers by providing comprehensive product services for common mode filters for automotive communication.