The CMS3-4-R is a surface mount common mode inductor designed for effective EMI filtering. It provides a minimum open circuit inductance of 88 µH and supports a maximum RMS current of 3.95 Amps. Key electrical characteristics include a typical DC resistance of 0.010 Ω per winding, a leakage inductance of 0.85 µH, and an interwinding capacitance of 3.50 pF. This ferrite core inductor offers 300Vdc winding-to-winding isolation and is suitable for applications such as DC-DC brick power supplies, discrete output supplies, and point-of-use power systems (PUPS).