TDK Corporation unveils miniaturized common-mode chokes for automotive ethernet

  • Industry News
  • May 21,20
The new product comes in a metal frame that connects electrodes, the choke shows excellent thermal behaviour, enabling it to be used within a wide temperature range from -40 °C to +125 °C.
TDK Corporation unveils miniaturized common-mode chokes for automotive ethernet

TDK Corporation, a Japanese electronics company, has recently launched 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.

This new choke has a high value 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. Its volume production began in May 2020.

The new product comes in a metal frame that connects electrodes, the choke shows 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.

The new product is compact 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.

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