1© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com E5007_ESD-FPD • 3/29/2017
One world. One KEMET
EMI Core
ESD-FPD Series Split Cores with Metal Clamp for Flat Cables
Overview
The KEMET ESD-FPD Series split
cores are designed for use on at
cable. The series features a stainless
steel clamp and is available in a
variety of sizes.
Benets
• Split construction
• Stainless steel clamp
Applications
• Consumer electronics
Turns and Impedance Characteristics
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 through the inner hole of the core. Windings
on the outside of the core do not count. See Figure 1 for
examples of one, two, and three turns.
Adding turns will result in higher impedance while also
lowering the effective frequency range. See Figure 2 for
an example.
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.
For reference, the Ni-Zn core material is
typically effective for the frequencies in the
MHz band range such as the FM-band, while
the Mn-Zn core material is typically effective for
the kHz band range such as the AM-band. See
Figure 3.
It is recommended to verify actual
effectiveness in the target application with
measurements.
EMI Core
5
EMI Cores
Ring Type
　There are two materials of ferrite, Ni-Zn series and Mn-Zn ser ies. Ni-Zn series is e
ive for kHz band range.
　Note that above e band range i s a reference only. Examination of s
with actual instrument is necessary.
　As Mn-Zn series has lower resistance compared to Ni-Zn series, make sure to provide
adequate insulation before use.
Characteristics and how to count turns
　Number of turns are counted by how many times the lead wire pa sses through the inner
hole of the core. Do not count the number of lead wire winding outside the core, as it results
　When desired performance can not be obtained just b y 1 turn, impedance characteristics
value can be raised b y increasing th e turn. In this case, the e frequency band should
be checked that it is in the desired range as adding turns resu lts in lowering down the
Tips on EMI Core Usages
（Represe ntative Example：ESD-R-16C）
Fig.1　How to count turns Fig.2　Relationship between impedance an d turn counts
*Number of lead wire wound outside the core + 1
= Number of read wire passes through the inner
hole of the core
= Turn count
Mn-Zn series vs Ni-Zn series ｜Z｜-f Characteristics (representative example)
(measurement condition: measured with same-dimension ring core)
Fig.3　te
AM band range FM band range
MnZn series core
NiZn series core
Impedance (Ω)
1000
100
10
1
0.01 0.1 1 10 100 1000
Impedance Increase
Resonance point changes to lower band
3T
2T
1T
Frequency (MHz)
Impedance (Ω)
Frequency (MHz)
10000
1 10 100 1000
1000
100
10
1
3T2T1T
Figure 1 – How to count turns
EMI Core
5
EMI Cores
Ring Type
　There are two materials of ferrite, Ni-Zn series and Mn-Zn ser ies. Ni-Zn series is e
ive for kHz band range.
　Note that above e band range i s a reference only. Examination of s
with actual instrument is necessary.
　As Mn-Zn series has lower resistance compared to Ni-Zn series, make sure to provide
adequate insulation before use.
Characteristics and how to count turns
　Number of turns are counted by how many times the lead wire pa sses through the inner
hole of the core. Do not count the number of lead wire winding outside the core, as it results
　When desired performance can not be obtained just b y 1 turn, impedance characteristics
value can be raised b y increasing th e turn. In this case, the e frequency band should
be checked that it is in the desired range as adding turns resu lts in lowering down the
Tips on EMI Core Usages
（Represe ntative Example：ESD-R-16C）
Fig.1　How to count turns Fig.2　Relationship between impedance an d turn counts
*Number of lead wire wound outside the core + 1
= Number of read wire passes through the inner
hole of the core
= Turn count
Mn-Zn series vs Ni-Zn series ｜Z｜-f Characteristics (representative example)
(measurement condition: measured with same-dimension ring core)
Fig.3　te
AM band range FM band range
MnZn series core
NiZn series core
Impedance (Ω)
1000
100
10
1
0.01 0.1 1 10 100 1000
Impedance Increase
Resonance point changes to lower band
3T
2T
1T
Frequency (MHz)
Impedance (Ω)
Frequency (MHz)
10000
1 10 100 1000
1000
100
10
1
3T2T1T
Figure 2 – Relationship between impedance and turn count.
(Representative example: ESD-R-16C)
EMI Core
5
EMI Cores
Ring Type
　There are two materials of ferrite, Ni-Zn series and Mn-Zn ser ies. Ni-Zn series is e
ive for kHz band range.
　Note that above e band range i s a reference only. Examination of s
with actual instrument is necessary.
　As Mn-Zn series has lower resistance compared to Ni-Zn series, make sure to provide
adequate insulation before use.
Characteristics and how to count turns
　Number of turns are counted by how many times the lead wire pa sses through the inner
hole of the core. Do not count the number of lead wire winding outside the core, as it results
　When desired performance can not be obtained just b y 1 turn, impedance characteristics
value can be raised b y increasing th e turn. In this case, the e frequency band should
be checked that it is in the desired range as adding turns resu lts in lowering down the
Tips on EMI Core Usages
（Represe ntative Example：ESD-R-16C）
Fig.1　How to count turns Fig.2　Relationship between impedance an d turn counts
*Number of lead wire wound outside the core + 1
= Number of read wire passes through the inner
hole of the core
= Turn count
Mn-Zn series vs Ni-Zn series ｜Z｜-f Characteristics (representative example)
(measurement condition: measured with same-dimension ring core)
Fig.3　te
AM band range FM band range
MnZn series core
NiZn series core
Impedance (Ω)
1000
100
10
1
0.01 0.1 1 10 100 1000
Impedance Increase
Resonance point changes to lower band
3T
2T
1T
Frequency (MHz)
Impedance (Ω)
Frequency (MHz)
10000
1 10 100 1000
1000
100
10
1
3T2T1T
Figure 3 – Effective band range of Mn-Zn and Ni-Zn ferrite core material.
(Representative example, measured with same-dimension ring core)
2© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com E5007_ESD-FPD • 3/29/2017
EMI Core – ESD-FPD Series Split Cores with Metal Clamp for Flat Cables
Dimensions – Millimeters
Core
A
C
B
E
11. 3
3.0
0. 3
R (0.5)
13.4
13.4
R1
A
B
C
D
C (0.3~0.5)
E
A
C
B
D
E
B
D
C (0.2~1)
C (0.2~0.5)
5.5
3.5
7.1
4.5
21
7.0 14.8
14.5
2.0
9.5 17
28
22. 3
C (0.3~0.5)
A
C
E
D
R1
10. 3
3.0
D Maximum
See Table 1 for dimensions
Installation Example
EMI Core
21
Flat TypeEMI Cores
Ring Type
ESD-FPD Series (Core)
a
c
b
e
ESD-FPD Series Clamp (Stainless steel)
11.3
3.0
0.3
R(0.5)
13.4
13.4
R1
Fig.1
a
b
c
d
C(0.3~0.5)
e
Fig.2
a
c
b
d
e
Fig.3
b
d
C(0.2~1)
C(0.2~0.5)
ESD-FPD-1 Series Clamp FPD-CL-1 (Black nylon with cable stopper)
5.5
3.5
7.1
4.5
21
7.0 14.8
14.5
2.0
9.5 17
28
22.3
C(0.3~0.5)
a
c
e
d
R1
10.3
3.0
Shape and Dimensions
[mm]
ESD-FPD-16 37.0 25.4 10.0 12.7 2.6 16 core Stainless steel clamp
ESD-FPD-16-1 37.0 25.4 10.0 12.7 2.6 16 core Nylon clamp
ESD-FPD-34 60.0 48.3 10.0 12.7 2.0 34 core Stainless steel clamp
ESD-FPD-34-1 60.0 48.3 10.0 12.7 2.0 34 core Nylon clamp
ESD-FPD-40 68.0 56.0 10.0 12.7 2.0 40 core Stainless steel clamp
ESD-FPD-40-1 68.0 56.0 10.0 12.7 2.0 40 core Nylon clamp
ESD-FPD-50 80.0 68.6 10.0 12.7 2.0 50 core Stainless steel clamp
ESD-FPD-50-1 80.0 68.6 10.0 12.7 2.0 50 core Nylon clamp
ESD-FPD Series
Model Dimensions (mm) Applicable cable Remarks
abcde
Application Example
Environmental Compliance
All KEMET EMI cores are RoHS Compliant.
RoHS Compliant
Clamp (Stainless Steel)
A
C
B
E
11. 3
3.0
0. 3
R (0.5)
13.4
13.4
R1
A
B
C
D
C (0.3~0.5)
E
A
C
B
D
E
B
D
C (0.2~1)
C (0.2~0.5)
5.5
3.5
7.1
4.5
21
7.0 14.8
14.5
2.0
9.5 17
28
22. 3
C (0.3~0.5)
A
C
E
D
R1
10. 3
3.0
D Maximum
3© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com E5007_ESD-FPD • 3/29/2017
EMI Core – ESD-FPD Series Split Cores with Metal Clamp for Flat Cables
Table 1 – Ratings & Part Number Reference
Impedance vs. Frequency
Part Number Dimensions (mm) Applicable Cable
A B C D E
ESD-FPD-16
37.0
25.4
10.0
12.7
2.6
ESD-FPD-34
60.0
48.3
10.0
12.7
2.0
ESD-FPD-40
68.0
56.0
10.0
12.7
2.0
ESD-FPD-50
80.0
68.6
10.0
12.7
2.0
EMI Core
27
Flat Type
1 10 100 1000
1
10000
1000
100
10
Impedance ()
Frequency (MHz)
1 10 100 1000
1
10000
1000
100
10
Impedance ()
Frequency (MHz)
1 10 100 1000
1
10000
1000
100
10
Impedance ()
Frequency (MHz)
1 10 100 1000
1
10000
1000
100
10
Impedance ()
Frequency (MHz)
ESD-FPD-16,16-1 ESD-FPD-34,34-1
ESD-FPD-40,40-1 ESD-FPD-50,50-1
Impedance vs. Frequency
EMI Core
27
Flat Type
1 10 100 1000
1
10000
1000
100
10
Impedance ()
Frequency (MHz)
1 10 100 1000
1
10000
1000
100
10
Impedance ()
Frequency (MHz)
1 10 100 1000
1
10000
1000
100
10
Impedance ()
Frequency (MHz)
1 10 100 1000
1
10000
1000
100
10
Impedance ()
Frequency (MHz)
ESD-FPD-16,16-1 ESD-FPD-34,34-1
ESD-FPD-40,40-1 ESD-FPD-50,50-1
Impedance vs. Frequency
4© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com E5007_ESD-FPD • 3/29/2017
EMI Core – ESD-FPD Series Split Cores with Metal Clamp for Flat Cables
KEMET Electronic Corporation Sales Of ces
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Disclaimer
All product specifi cations, statements, information and data (collectively, the “Information”) in this datasheet are subject to change. The customer is responsible for
checking and verifying the extent to which the Information contained in this publication is applicable to an order at the time the order is placed.
All Information given herein is believed to be accurate and reliable, but it is presented without guarantee, warranty, or responsibility of any kind, expressed or implied.
Statements of suitability for certain applications are based on KEMET Electronics Corporation’s (“KEMET”) knowledge of typical operating conditions for such
applications, but are not intended to constitute – and KEMET specifi cally disclaims – any warranty concerning suitability for a specifi c customer application or use.
The Information is intended for use only by customers who have the requisite experience and capability to determine the correct products for their application. Any
technical advice inferred from this Information or otherwise provided by KEMET with reference to the use of KEMET’s products is given gratis, and KEMET assumes no
obligation or liability for the advice given or results obtained.
Although KEMET designs and manufactures its products to the most stringent quality and safety standards, given the current state of the art, isolated component
failures may still occur. Accordingly, customer applications which require a high degree of reliability or safety should employ suitable designs or other safeguards
(such as installation of protective circuitry or redundancies) in order to ensure that the failure of an electrical component does not result in a risk of personal injury or
property damage.
Although all product–related warnings, cautions and notes must be observed, the customer should not assume that all safety measures are indicted or that other
measures may not be required.
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