Common mode filters target automotive Ethernet

TDK Corp. has unveiled its new ACT1210E Series  of common mode filters for automotive Ethernet 10BASE-T1S. The series is compliant with AEC-Q200 Rev. D

(Source: TDK Corp.)

Claimed as the industry’s first, the ACT1210E common mode filters leverage TDK’s proprietary wire winding structure and optimal materials, resulting in the industy’s best high S-parameters (Scattering parameters) and a maximum line-to-line capacitance of 10 pF. The series laser welds winding wires to the metalizing terminals, which provides high thermal shock resistance and high reliability.

“Among the Ethernet telecommunication standards, 10BASE-T1S is unique in its support of multidrop topologies, which enables multiple electronic control units (ECUs) to be connected,” said TDK. “In this respect, it differs from 100BASE-T1 and 1000BASE-T1, which support peer-to-peer telecommunication only.”

TDK also noted that more customers are considering the move to Ethernet systems away from the traditional CAN, CAN FD and Flex-Ray standards for automotive to achieve a uniformity of standards.

Key specs for the ACT1210E-241-2P-TL00 include a common mode inductance of 240 μH with a tolerance of +50%/-20%, a DC resistance of 4.1 Ω, a rated current of 70 mA, an insulation resistance of 10 MΩ, a line-to-line capacitance of 10 pF and a rated voltage of 80 V. The operating temperature range is –40°C to 125°C.

The ACT1210E common mode filter series saves space in a 3.2 × 2.5 × 2.5 mm footprint. The series is in mass production, starting in February 2023.