ESD-SR-S25 Kemet

EMI Cores ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case) Overview Applications The KEMET ESD-SR Series snap-on toroidal cores are Consumer electronics d esi g n e d fo r us e o n r o u n d c a b l es. T h e w i d e r a n g e of Airconditioners Ma n ga n es e Z i n c ( M n Z n) a n d N i c ke l Z i n c ( N i Z n) o p ti o ns Power conditioners all ows fo r t a r g e ti n g of s p e c i fi c fr e q u e n c y r a n g es. R efr ige r a tors Was hi n g ma c hi n es EMI cores are part of a family of passive components which I n d us tr ial e q u i p m e n t a d d r es s th e is su es of n ois e o r e l e c tr o ma g n e ti c i n te r fe r e n c e M e di c al e q u i p m e n t ( E M I ) i n c i r c u i t s o r sys te ms. Adapters Au di o - v isual e q u i p m e n t Business multifunction printers Benefits M n Z n 10 M Hz (A M ba n d r a n g e) a n d N i Z n 3 0 0 M Hz ( F M ba n d r a n g e) o p ti o ns availa b l e Split construction E asy to i ns t all th r o u g h i t s s na p - o n m e c a nis m Q u i c k so l u ti o n fo r p os t - c a b l e as se m b l y n oise is su e O p e r a ti n g te m p e r a t u r e r a n g e fr o m 25 C to + 8 5 C U L9 4 V0 fla m e r e t a r da n t r a te d c ase One world. One KEMET KEMET Electronics Corporation KEMET Tower One East Broward Boulevard E5005 ESD-SR 3/31/2020 1 Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.comEMI Core ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case) Part Number System ESD- SR- S 38 G C o r e S i z e Series Form Type Shape type Case Color O u t e r D i m e n s i o n C o d e (m m) ESD- Snap-on Blank = Sleeve S e e Ta b l e 1 Blank = Black S = R i n g G = Gray N ote: M = B l a c k ( M n -Z n) Figure 1 How to count turns Turns and Impedance Characteristics W h e n th e d esi r e d p e r fo r ma n c e of a n E M I c o r e c a n n o t b e o b t ai n e d w i th a si n g l e pas s th r o u g h th e c o r e , th e i m p e da n c e c ha r a c te r is ti c s c a n b e c ha n g e d w i th m u l ti p l e t u r ns. 1T 2T 3T A t u r n is c o u n te d by th e n u m b e r of l ea d - w i r e w i n di n gs w hi c h pas s th r o u g h th e i n n e r h o l e of th e c o r e . W i n di n gs o n th e o u t si d e of th e core do not count. Figure 2 Relationship between impedance and turn count. (Representative example: ESD-R-16C) S e e F i g u r e 1 fo r e xa m p l es of o n e , t wo , a n d th r e e t u r ns. 10,000 Resonance point changes to lower band A d di n g t u r ns w ill r esu l t i n hi g h e r i m p e da n c e w hil e als o l owe r i n g 3T 1,000 th e e f fe c ti ve f r e q u e n c y r a n g e . 2T 100 S e e F i g u r e 2 fo r a n e xa m p l e . 1T 10 1 1 10 100 1,000 Core Material and Effective Frequency Frequency (MHz) Range There are two ferrite material options for KEMET Figure 3 Effective band range of Mn-Zn and Ni-Zn ferrite core material. E M I C o r es: N i c ke l Z i n c ( N i -Z n) a n d Ma n ga n ese (Representative example, measured with same-dimension ring core) Z i n c ( M n -Z n). E a c h c o r e ma te r ial has a dif fe r e n t 1,000 r esis t a n c e a n d e f fe c ti ve f r e q u e n c y r a n g e . T h e MnZn core material has a lower resistance AM band range FM band range c o m pa r e d to th e N i -Z n th e r e fo r e , a d e q ua te Ni-Zn series core i nsu la ti o n is r e q u i r e d b e fo r e use . 100 Mn-Zn series core T h e N i -Z n c o r e ma te r ial is t y p i c all y e f fe c ti ve fo r f r e q u e n c ies i n th e M Hz ba n d r a n g e su c h as 10 th e F M - ba n d , w hil e th e M n -Z n c o r e ma te r ial is t y p i c all y e f fe c ti ve fo r th e k Hz ba n d r a n g e su c h as th e A M - ba n d. S e e F i g u r e 3. 1 0.01 0.1 1 10 100 1,000 It is recommended to measure the actual Frequency (MHz) fr e q u e n c y r a n g e e f fe c ti ve n es s i n th e t a r g e t application. KEMET Electronics Corporation KEMET Tower One East Broward Boulevard E5005 ESD-SR 3/31/2020 2 Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.com Impedance () Impedance () Impedance Increase