ACM2012H Series Common Mode Filters TDK ACM2012H Common Mode Filters are designed for ultra high-speed differential signal lines. These common mode filters offer 6GHz of differential mode cutoff frequency that does not negatively influence high-speed differential signals. ACM2012H filters characteristic impedance is matched for 100Ω and can suppress unnecessary reflection components. TDK ACM2012H Common Mode Filters are ideal for use in applications such as HDMI, DVI, display ports, and USB3.0.