Common mode filter for signal lines
The TDK ACM2520-801-3P-T002 is a three-line common mode filter from the ACM series, designed for signal line EMI suppression on differential pairs or multi-line interfaces. Its 800 Ohm impedance at 100 MHz targets common-mode noise in the 100 MHz+ band — the range where USB, HDMI, and LVDS clock harmonics radiate. The 150 mA current rating and 20 VDC voltage rating match low-power signal paths rather than power rails.
Parametric fit for the BOM
The 1.6 Ohm max DCR limits the voltage drop across the filter to under 250 mV at 150 mA, so signal amplitude stays within the receiver's input threshold.