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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