Circuit & System Protection


Common-mode filter with ESD suppression

28 April 2010 Circuit & System Protection

TDK-EPC has introduced a thin-film common-mode filter with both high-speed differential transmission common-mode noise suppression and ESD protection.

The TCE1210 is the same size as existing TDK common-mode filters (1,25 × 1,00 × 0,60 mm), but using the proprietary thin-film circuit formation and materials technologies, the company successfully added an ESD suppressor function to the EMI function already present in the internal structure of existing filters. As a result, an additional varistor for ESD suppression is no longer needed.

The new filter’s cutoff frequency is 5,0 GHz, the common-mode impedance is 90 Ω ±25 Ω, rated current is 100 mA, and ESD immunity complies with the IEC 61000-4-2 international surge standards. In addition, the filter’s low parasitic capacitance has nearly no effect on the impedance characteristic (TDR measurement), making it well suited for use with high-speed, high-volume interfaces such as HDMI, USB 3.0 and SATA in consumer electronics applications.



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