EMI Cores ESD-SR-H/HL Snap-on Cores for Round Cables for High Frequency (with High Heat Resistance & Cable Holding Mechanism case) Overview Applications The KEMET ESD-SR-H/HL Series snap-on toroidal Automotive inverters cores feature high heat resistance and a cable holding Automotive chargers m e c ha nis m d esi g n e d s p e c i fi c all y fo r r o u n d c a b l es. Automotive DC/DC converters KEMETs unique core material enables high performance in LED head lights high frequency range. Information and communication devices Audio-visual equipment EMI cores are part of a family of passive components which Consumer electronics address the issues of noise or electromagnetic interference (EMI) in circuits or systems. Benefits Proprietary core material for high performance in high frequency range Split construction Easy to install through its snap-on mecanism Quick solution for post-cable assembly noise issue W i d e r 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 +10 0C fo r H t y p e a n d 4 0C to +125 C fo r H L t y p e (ideal for automotive environment) C a b l e h o l di n g m e c ha nis m fo r fi x i n g c a b l es w i th ba n ds U L9 4 V0 fla m e r e t a r da n t r a te d c ase AECQ200 (HL type) Part Number System ESD- SR- 160 H Core Size Series Form Type Case Type Outer Dimension Code (mm) ESD- Snap-on See Table 1 High heat resistance H = 4 0 C t o 10 0 C H L = 4 0 C t o 12 5 C Built Into Tomorrow KEMET Electronics Corporation KEMET Tower One East Broward Boulevard E5006 ESD-SR-H 11/22/2021 1 Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.comEMI Core ESD-SR-H/HL Snap-on Cores for Round Cables for High Frequency (with High Heat Resistance & Cable Holding Mechanism case) Turns and Impedance Characteristics Figure 1 How to count turns When the desired performance of an EMI core cannot be obtained with a single pass through the core, the impedance characteristics can be changed with multiple turns. A turn is counted by the number of lead-wire windings which pass 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 Adding turns will result in higher impedance while also lowering Resonance point changes to lower band the effective frequency range. 3T 1,000 2T S e e F i g u r e 2 fo r a n e xa m p l e . 100 1T 10 1 Core Material and Effective Frequency Range 1 10 100 1,000 Frequency (MHz) There are two ferrite material options for KEMET EMI Cores: Nickel Zinc (Ni-Zn) and Manganese Zinc (Mn-Zn). Each core material has a different resistance and effective frequency range. The Figure 3 Effective band range of Mn-Zn and Ni-Zn ferrite core material. (Representative example, measured with same-dimension ring core) MnZn core material has a lower resistance 1,000 compared to the Ni-Zn therefore, adequate insulation is required before use. AM band range FM band range The Ni-Zn core material is typically effective Ni-Zn series core 100 for frequencies in the MHz band range such as Mn-Zn series core the FM-band, while the Mn-Zn core material is typically effective for the kHz band range such as 10 the AM-band. See Figure 3. It is recommended to measure the actual frequency range effectiveness in the target 1 application. 0.01 0.1 1 10 100 1,000 Frequency (MHz) KEMET Electronics Corporation KEMET Tower One East Broward Boulevard E5006 ESD-SR-H 11/22/2021 2 Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.com Impedance () Impedance () Impedance Increase