EMI Cores ESD-R-NC Toroidal Nanocrystal Cores for Round Cables for Low & High Frequency (with case & with fixing base) Overview Applications The KEMET ESD-R-NC Series solid toroidal cores are General purpose inverters d esi g n e d fo r us e o n r o u n d c a b l es. K E M E T s na n o c r ys t al HVAC material allows effective noise suppression in a wide Air conditioners frequency range, which is an impressive solution for any Power conditioners conducted or radiated noise in the kHz to MHz regions. Industrial equipment T h e base t y p e all ows fi x i n g th e c o r e i n th e a p p li c a ti o n to Business multifunction printers avoi d c o n t a c t w i th o th e r c o m p o n e n t s o r s t a b ilizi n g th e c a b l es , a n d i n a d di ti o n th e bas es s tr u c t u r e c a n c o n n e c t th e cores together for make it even easier to install. EMI cores are part of a family of passive components which address the issues of noise or electromagnetic interference (EMI) in circuits or systems. Benefits Wide frequency range Solid construction From small to large diameter ring type W i d e o p e r a ti n g te m p e r a t u r e r a n g e f r o m 4 0C to +12 0C fo r s t a n da r d t y p e a n d 4 0C to +13 0C fo r base t y p e U L9 4 V- 0 fla m e r e t a r da n t r a te d c as e E asy to i ns t all th e w i th fi x i n g base t y p e w i th t wo s c r ews Standard Case Type W i th F ixin g Base Ty p e One world. One KEMET KEMET Electronics Corporation KEMET Tower One East Broward Boulevard E5011 ESD-R-NC 3/25/2019 1 Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.comEMI Core ESD-R-NC Toroidal Nanocrystal Cores for Round Cables for Low & High Frequency (with case & with fixing base) Part Number System ESD- R- 291216H- NC 23 -BT Core Size Series Shape Type Core Material M a t e r i a l S p e c i fi c a t i o n Type OD & ID & T Code (mm) ESD- Ring S e e Ta b l e 1 Nanocrystal 21 Blank = Standard case 23 B T = W i t h fi x i n g b a s e 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. 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 1T 2T 3T through the inner hole of the core. Windings on the outside of the core do not count. Figure 2 Relationship between impedance and turn count. 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. (Representative example: ESD-R-16C) 10,000 Resonance point changes to lower band Adding turns will result in higher impedance while also lowering 3T 1,000 the effective frequency range. 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 Range Frequency (MHz) The Nanocrystal core material is typically e f fe c ti ve fo r f r e q u e n c ies i n th e b r oa d ba n d r a n g e . See Figure 3. Figure 3 - Effective band range of Nanocrystal core material. (Representative example, measured with same-dimension ring core) It is recommended to measure the actual 1,000 frequency range effectiveness in the target application. AM band range FM band range 100 Nanocrystal series core Ni-Zn series core 10 Mn-Zn series core 1 0.01 0.1 1 10 100 1,000 Frequency (MHz) KEMET Electronics Corporation KEMET Tower One East Broward Boulevard E5011 ESD-R-NC 3/25/2019 2 Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.com Impedance () Impedance () Impedance Increase