Automotive Ethernet common mode choke coil for extreme temperatures

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By Nick Flaherty

Murata has developed a common mode choke coil (CMCC) for Automotive Ethernet (100BASE-T1) applications that withstands extreme temperatures from -55 to +150 ºC and is AEC-Q200 compliant.

In recent years, as cars have become equipped with more advanced features, the number of ECUs installed in them has been increasing in order to support the functions of autonomous driving systems such as ADAS. As networks for connecting these ECUs, high-speed interfaces that support the differential signal transmission systems like Automotive Ethernet are becoming more and more common. Along with, and to serve this trend, there is a growing need for components that can be used in high temperature environments such as engine compartments.

Murata’s DLW32MH201YK2 common mode choke coil weight 0.06g and compares very favourably to the -40 to +125 ºC temperature range of conventional products, allowing it to be used in harsh temperature environments. This improved performance has been achieved by employing metal termination that absorbs the stresses associated with temperature change, as well as by optimizing the combination of Murata’s own original materials and product design. Moreover, as the product’s form factor has been kept to a small size of 1210 (3.2 x 2.5 mm), ECUs can be installed in a wider range of areas.

Mass production of the AEC-Q200 compliant 80V rated choke coil has begun, and Murata will continue to develop products that meet the needs of the market and contribute to enhancing the automotive networks that support autonomous driving.

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