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ESD-R-38C-1 PDF预览

ESD-R-38C-1

更新时间: 2024-11-07 02:55:35
品牌 Logo 应用领域
基美 - KEMET /
页数 文件大小 规格书
10页 1064K
描述
Toroidal Cores

ESD-R-38C-1 数据手册

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EMI Core  
ESD-R Series Toroidal Cores  
Overview  
Benefits  
Applications  
The KEMET ESD-R Series solid  
toroidal cores are designed for use on  
round cable. A wide range of MnZn  
and NiZn options are available in Bare,  
Coated, and Case types.  
•ꢀ MnZnꢀ(≤ꢀ100ꢀMHz,ꢀAMꢀbandꢀrange)ꢀ  
andꢀNiZnꢀ(≤ꢀ300ꢀMHz,ꢀFMꢀbandꢀ  
range) options available  
• Solid construction  
• Bare, Coated, and Case types  
available  
• Consumer  
electronics  
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.  
1T  
2T  
3T  
A turn is counted by the number of lead-wire windings  
which pass through the inner hole of the core. Windings  
onꢀtheꢀoutsideꢀofꢀtheꢀcoreꢀdoꢀnotꢀcount.ꢀSeeꢀFigureꢀ1ꢀforꢀ  
examples of one, two, and three turns.  
Figure 2 – Relationship between impedance and turn count.  
(Representative example: ESD-R-16C)  
10000  
Resonance point changes to lower band  
Adding turns will result in higher impedance while also  
loweringꢀtheꢀeffectiveꢀfrequencyꢀrange.ꢀSeeꢀFigureꢀ2ꢀforꢀ  
an example.  
1000  
3T  
2T  
1T  
100  
10  
1
Core Material and Effective Frequency Range  
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 Mn-Zn core material  
has lower resistance compared to the Ni-  
Zn; therefore, be sure to provide adequate  
insulation before use.  
1
10  
100  
1000  
Frequency (MHz)  
Figure 3 – Effective band range of Mn-Zn and Ni-Zn ferrite core material.  
(Representative example, measured with same-dimension ring core)  
1000  
AM band range  
MnZn series core  
FM band range  
NiZn series core  
Forꢀreference,ꢀtheꢀNi-Znꢀcoreꢀmaterialꢀisꢀ  
typically effective for the frequencies in the  
MHzꢀbandꢀrangeꢀsuchꢀasꢀtheꢀFM-band,ꢀwhileꢀ  
the Mn-Zn core material is typically effective for  
theꢀkHzꢀbandꢀrangeꢀsuchꢀasꢀtheꢀAM-band.ꢀSeeꢀ  
Figureꢀ3.  
100  
10  
1
It is recommended to verify actual  
effectiveness in the target application with  
measurements.  
0.01  
0.1  
1
10  
100  
1000  
Frequency (MHz)  
One world. One KEMET  
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com  
E5001_ESD-R • 3/28/2017  
1

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