Compact automotive feedthrough filter offers 1µF capacitance

13th February 2018

Alice Matthews

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Global electronics company, TDK, has extended its lineup of 3-terminal feedthrough filters for automotive applications. The new YFF18AC0J105M type is available in an IEC 1608 package (EIA 0603) with compact dimensions of 1.6x0.8x0.6mm and features what is supposedly the industry’s highest capacitance of 1µF for a feedthrough filter of its size. The component offers a rated current of 2A and a rated voltage of 6.3V.

The new filter is qualified according to AEC-Q200 and is suitable for a range of decoupling applications to protect automotive ECUs from EMI. Mass production of the components began in January 2018.

According to TDK, its feedthrough filters represent an effective and space-saving decoupling and noise suppression solution for sophisticated automotive applications such as advanced driver assistance systems (ADAS) with their increasingly demanding requirements.

In particular, as the functionality of on-board ICs becomes more advanced, conventional decoupling designs require increasing numbers of MLCCs to protect the ECUs from EMI.

Thanks to its high capacitance and low ESL, the new feedthrough filter from the YFF18AC series can achieve a lower impedance at a frequency of several ten MHz, for example, than five 0.22µF IEC 1005 MLCCs connected in parallel.

The result is a smaller number of components needed and significant space savings.

In the future, the capacitance range of the automotive-grade feedthrough filters will be further expanded in order to support an even wider spectrum of automotive applications.