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ESD-FPD-16-1 Scheda tecnica(PDF) 3 Page - Kemet Corporation |
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ESD-FPD-16-1 Scheda tecnica(HTML) 3 Page - Kemet Corporation |
3 / 8 page 3 © KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard E5008_ESD-FPD-1 • 9/17/2018 Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com EMI Core – ESD-FPD-1 Series Split Cores with Plastic Clamp for Flat Cables for High Frequency (Bare) Magnetic Permeability of Ferrite Material Inordertoachievemostefficientnoisereduction,itisimportanttoselectthematerialaccordingtothetargetfrequency band.Dependingonitsmagneticpermeability,aparticularferritematerialwillbeeffectiveinacertainfrequencyband. Aschematicrepresentationoftherelationshipbetweenthemagneticpermeabilityofeachmaterialandthecorresponding effectivebandrangeisshowninFigure1.Materialswithhighermagneticpermeabilityareeffectiveinthelowerfrequency range,whilethosewithlowermagneticpermeabilityareeffectiveinthehigherfrequencyrange.Thus,Mn-Znproductsare mainlyusedforreducingconductionnoise,whileNi-Znproductsarecommonlyusedforradiationnoisecountermeasures. Theeffectivefrequencyrangevariesdependingoncoreshape,sizeandnumberofwindings.Thisfrequencydependence ofthemagneticpermeabilityasshowninthefigureservesforreferencepurposesonlyanditshouldbetestedontheactual device to determine its effectiveness. S18H,S15H,10H,7H,5H,1400Land700LareKEMET’sproprietaryferritematerialnames. Othermaterialscanalsobeavailableonrequest. Figure 2 - Relationship between the magnetic permeability of each material and its effective frequency range 10 kHz 0 10,000 20,000 100 kHz 1 MHz 10 MHz 100 MHz 1 GHz Effective Frequency Range Ni-Zn Series 1400L 700L S18H S15H 10H 7H 5H Mn-Zn Series Lower magnetic permeability: Higher noise suppression effect in the higher frequency range Higher magnetic permeability: Higher noise suppression effect in the lower frequency range |
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