EMI Cores
ESD-FPD Series Split Cores with Metal Clamp
for Flat Cables for High Frequency (Bare)
Overview
The KEMET ESD-FPD Series split cores are designed for
use on flat cable. A wide range of Nickel Zinc (NiZn) options
allow for targeting of specific high frequency ranges. Each
product features two core parts and two stainless steel
clamps.
EMI cores are part of a family of passive components which
address the issues of noise or electromagnetic interference
(EMI) in circuits or systems.
Applications
• Office equipment
• Home appliances
• Inkjet printers
• Consumer electronics
• Industrial equipment
• Test and measurement equipment
• Medical equipment
• Audio-visual equipment
Benefits
• NiZn ≤ 300 MHz (FM band range) options available
• Split construction
• Easy to install through its clamp mecanism
• Quick solution for post-cable assembly noise issue
• Stainless steel clamp
Each part number includes two ferrite parts and two clamps, as shown in the picture.
Part Number System
ESD-
Series
ESD-
FPD-
Form Type
Split
16
Applicable Cable
xx = xx Core
Clamp Type
Blank = Stainless steel clamp
One world. One KEMET
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
E5007_ESD-FPD • 9/17/2018
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EMI Core – ESD-FPD Series Split Cores with Metal Clamp for Flat Cables for High Frequency (Bare)
Core Material and Effective Frequency Range
There are two ferrite material options for KEMET
EMI Cores: Nickel-Zinc (NiZn) and Manganese
Zinc (MnZn). Each core material has a different
resistance and effective frequency range. The
MnZn core material has a lower resistance
compared to the NiZn; therefore, adequate
insulation is required before use.
The NiZn core material is typically effective for
frequencies in the MHz band range such as the
FM-band, while the MnZn core material is typically
effective for the kHz band range such as the AM-
band. See Figure 1.
It is recommended to measure the actual
frequency range effectiveness in the target
application.
Impedance (Ω)
Figure 1 – Effective band range of Mn-Zn and Ni-Zn ferrite core material.
(Representative example, measured with same-dimension ring core)
1,000
AM band range
100
FM band range
Ni-Zn series core
Mn-Zn series core
10
1
0.01
0.1
1
10
100
1,000
Frequency (MHz)
Environmental Compliance
All KEMET EMI cores are RoHS compliant.
Dimensions – Millimeters
Core
Clamp (Stainless Steel)
See Table 1 for dimensions
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
E5007_ESD-FPD • 9/17/2018
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EMI Core – ESD-FPD Series Split Cores with Metal Clamp for Flat Cables for High Frequency (Bare)
Magnetic Permeability of Ferrite Material
In order to achieve most efficient noise reduction, it is important to select the material according to the target frequency
band. Depending on its magnetic permeability, a particular ferrite material will be effective in a certain frequency band.
A schematic representation of the relationship between the magnetic permeability of each material and the corresponding
effective band range is shown in Figure 1. Materials with higher magnetic permeability are effective in the lower frequency
range, while those with lower magnetic permeability are effective in the higher frequency range. Thus, Mn-Zn products are
mainly used for reducing conduction noise, while Ni-Zn products are commonly used for radiation noise countermeasures.
The effective frequency range varies depending on core shape, size and number of windings. This frequency dependence
of the magnetic permeability as shown in the figure serves for reference purposes only and it should be tested on the actual
device to determine its effectiveness.
S18H, S15H, 10H, 7H, 5H, 1400L and 700L are KEMET’s proprietary ferrite material names.
Other materials can also be available on request.
Figure 2 - Relationship between the magnetic permeability of each material and its effective frequency range
20,000
Higher magnetic permeability:
Higher noise suppression effect
in the lower frequency range
Mn-Zn Series
S18H
Magnetic Permeability
S15H
10,000
10H
7H
5H
Lower magnetic permeability:
Higher noise suppression effect
in the higher frequency range
Ni-Zn Series
1400L
700L
100 kHz
1 MHz
10 MHz
100 MHz
1 GHz
0
10 kHz
Effective Frequency Range
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
E5007_ESD-FPD • 9/17/2018
3
EMI Core – ESD-FPD Series Split Cores with Metal Clamp for Flat Cables for High Frequency (Bare)
Installation Example
Performance Characteristics
Item
Operating temperature
Frequency range
Outer length
Outer width
Inner length
Inner width
Thickness
Type
Material
Performance Characteristics
−25°C to +85°C
High frequency
37.0 – 80.0 mm
10.0 mm
25.4 – 68.6 mm
2.0 – 2.6 mm
12.7 mm
Bare with stainless steel clamp
NiZn 700L
Table 1 – Ratings & Part Number Reference
Part
Number
ESD-FPD-16
ESD-FPD-34
ESD-FPD-40
ESD-FPD-50
1
Dimensions (mm)
A
37.0 ±1.0
60.0 ±1.0
68.0 ±1.0
80.0 ±1.0
Weight
E
2.6 ±1.0
2.0 ±1.0
2.0 ±1.0
2.0 ±1.0
B
25.4 ±1.0
48.3 ±1.0
56.0 ±1.0
68.6 ±1.0
C
10.0 ±2.0
10.0 ±2.0
10.0 ±2.0
10.0 ±2.0
D
12.7 ±1.0
12.7 ±1.0
12.7 ±1.0
12.7 ±1.0
(g)
21.58
32.28
37.08
42.48
Applicable
Cable
16 Core
34 Core
40 Core
50 Core
Frequency Range
1
≤ 300 MHz
(FM band range)
X
X
X
X
Material
MnZN
–
–
–
–
NiZn
700L
700L
700L
700L
Frequency range is for reference only. Please test with actual device before use.
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
E5007_ESD-FPD • 9/17/2018
4
EMI Core – ESD-FPD Series Split Cores with Metal Clamp for Flat Cables for High Frequency (Bare)
Impedance vs. Frequency
Packaging
Part Number
ESD-FPD-16
ESD-FPD-34
ESD-FPD-40
ESD-FPD-50
Packaging Type
Tray
Pieces per Box
800
250
240
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
E5007_ESD-FPD • 9/17/2018
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Embedded System
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