What is an EMI filter, EMI line filter, 3 phase EMI filter, EMI filter design

NFE Series 2706 4700 pF 2 A 50 V SMT LC Combined Type EMI Filter   Website URL: https://www.futureelectronics.com/p/passives–filters–emi-filters/nfe61pt472c1h9l-murata-4495610 Country List: Bangladesh