Common-Mode Choke Suits Automotive Ethernet

A series of common-mode chokes for automotive Ethernet from TDK Corp. measures 4.5 mm x 3.2 mm with an insertion height of just 2.8 mm. The miniaturized ACT45L series is reportedly world's smallest common-mode choke for automotive Ethernet and fulfills the standard's stiffest requirements. The specifications of the new automotive Ethernet standard with regard to common-mode noise suppression are significantly more demanding than the requirements of CAN and FlexRay. The higher the attenuation of the noise is, the better the performance of the common-mode choke. The noise suppression of the ACT45L is 15 dB to 25 dB better than existing products over a broad frequency range up to 100 MHz.

The ACT45L series is designed to be manufactured using fully-automated processes that include a high-precision autowinding process and the bonding of ferrite cores with a highly temperature- and moisture-resistant adhesive. The result is a new series of automotive components qualified to AEC-Q200 with high reliability and consistent quality.The product joins the existing ACT45B and ACT45R series of common-mode chokes for CAN and FlexRay, respectively, to form a highly versatile lineup of high-performance EMC components for automotive networks.