B-20L-25 KEMET

EMI Cores B-20 Bead Cores for Round Cables for Low & High Frequency (Bare & coated) Overview Applications T h e K E M E T B -2 0 se r ies b ea d c o r es a r e d esi g n e d to us e o n Computers r o u n d c a b l es. T h e w i d e r a n g e of Ma n ga n ese Z i n c ( M n Z n) Telecommunications a n d N i c ke l Z i n c ( N i Z n) o p ti o ns all ows fo r t a r g e ti n g s p e c i fi c I n d us tr ial e q u i p m e n t fr e q u e n c y r a n g es. Adapters Consumer electronics E M I c o r es a r e pa r t of a fa mil y of pas si ve c o m p o n e n t s , w hi c h 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 ( E M I ) i n c i r c u i t s o r sys te ms. 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 Solid construction B a r e a n d c oa te d t y p es availa b l e Part Number System B-20 L- 48 B-A C o r e S i z e Series Core Material Type O u t e r D i m e n s i o n (m m) B-20 F = Mn-Zn xx = x.x mm Blank = Bare L = N i -Z n B / B - A = C o a t e d (e xc e p t 4 8 B) B - L = I n s u l a t i o n r e s i s t a n c e t e s t i n g One world. One KEMET KEMET Electronics Corporation KEMET Tower One East Broward Boulevard E5009 B-20 3/31/2020 1 Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.comEMI Core B-20 Bead Cores for Round Cables for Low & High Frequency (Bare & coated) Core Material and Effective Frequency Range T h e r e a r e t wo fe r r i te ma te r ial o p ti o ns fo r K E M E T 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 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 Figure 1 Effective band range of Mn-Zn and Ni-Zn ferrite core material. 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 (Representative example, measured with same-dimension ring core) 1,000 MnZn core material has a lower resistance 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 AM band range FM band range i nsu la ti o n is r e q u i r e d b e fo r e use . Ni-Zn series core 100 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 Mn-Zn series core fr 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 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 10 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 1. 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. Environmental Compliance A ll K E M E T E M I c o r es a r e R o H S c o m p lia n t . Dimensions Millimeters ID OD T See Table 1 for dimensions KEMET Electronics Corporation KEMET Tower One East Broward Boulevard E5009 B-20 3/31/2020 2 Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.com Impedance ()