TDK Presents Miniaturized EMC Suppression Common-mode Chokes

for Automotive Ethernet

TDK Corporation presents the ACT1210G-800-2P, a new type of common-mode choke that conforms to the standards of the OPEN Alliance (One-Pair Ether-Net) for 1000BASE-T1.

Thanks to the high values of the S-parameters, a high amplitude ratio is created between differential and common-mode levels – a decisive factor for signal integrity in the automotive Ethernet. The common-mode inductance at 100 kHz is 80 µH, and the maximum permissible current is 70 mA. Volume production began in May 2020.

Thanks to a metal frame for the connecting electrodes, the choke offers excellent thermal behaviour, enabling it to be used within a wide temperature range from -40 °C to +125 °C. The new component is manufactured in a highly automated and extremely precise winding process which achieves high reliability and minimal scatter of the electrical parameters.

One particular feature is the compact size, with measurements of just 3.2 x 2.5 x 2.4 mm, significantly less than those of CAN-Bus or FlexRay chokes. This means that the new choke can be used, for example, in automotive camera systems featuring an ever-increasing packing density of components.

TDK will extend the permissible temperature range of its common-mode chokes and expand the product portfolio, including the products for high-speed communication so that it can serve even more automotive applications.

Main applications

• Automotive Ethernet based on 1000BASE-T1

Main features and benefits

• Compliant with standards of the OPEN Alliance for automotive Ethernet 1000BASE-T1
• Wide temperature range from -40 °C to +125 °C thanks to a metal frame for the connecting electrodes
• High reliability and minimal scatter of the electrical parameters due to a highly automated and extremely precise winding process
• Qualified in accordance with AEC-Q200

Key data

Source: TDK