AC Line Filters
Common Mode SCR Coils, 38 Series
Overview
Applications
The KEMET SCR coils are common mode chokes with
a wide variety of characteristics. These toroidal coils
are designed with our proprietary high permeability
ferrite S15H cores and are useful in various noise
countermeasure fields.
• Industrial equipment
• Home appliances
• Power supplies
Benefits
• Proprietary S15H ferrite material
• High permeability
• High impedance
• Space saving due to high permeability material
• Operating temperature range from −25°C to +120°C
• UL 94 V–0 flame retardant rated base and cap
Part Number System
SCR
38-
150-
1R7
A
050
JH
Series
Dimension Code
(See Dimensions)
Rated Current
(A)
Wire Diameter
(mm)
Windings
Inductance (mH)
Minimum
Terminal Base Type
Internal Control
Code
38
38B
xxx = xx.x A
R = Decimal point
Examples:
150 = 15.0 A
Examples:
1R7 = 1.7 mm
J = Vertical type
JH = Horizontal type
Blank
BK
SCR
A = Single
B = Double
xxx = xx.xmH
Examples:
050 = 5.0 mH
Note: With
exceptions,
see Table 1 for
details.
One world. One KEMET
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AC Line Filters – Common Mode SCR Coils, 38 Series
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 1 - 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
Magnetic Permeability
S18H
S15H
10H
10,000
Lower magnetic permeability:
Higher noise suppression effect
in the higher frequency range
7H
5H
Ni-Zn Series
0
10 kHz
1400L
700L
100 kHz
1 MHz
10 MHz
100 MHz
1 GHz
Effective Frequency Range
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LF0003_SCR38 • 10/14/2019
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AC Line Filters – Common Mode SCR Coils, 38 Series
Dimensions – Millimeters
Figure 1
Figure 2
OD
H
OD
L
T
(a)
(a)
N1
N2
L
N2
(b)
N1
(b)
(b)
H
(a)
(b)
(a)
Figure 4
OD
L
(a)
(b)
H
(a)
N1
(b)
N2
N2
L
N1
H
OD
(a)
T
(b)
Figure 3
(a)
(b)
Figure 5
OD
H
L
(a)
N1
Part Name
SCR38-150-1R7A050JH
SCR38-200-2R3A010J
SCR38-350-1R8B008J
SCR38-350-1R8B008JH
SCR38B-200-2R3A010JH
SCR38B-350-1R8B008JH-BK
1
N2
(b)
(b)
(a)
Dimensions
(mm)
OD
T
H
(Maximum) (Maximum) (Maximum)
51.0
53.0
53.0
53.5
55.0
54.5
35.0
35.0
-
34.0
51.0
51.0
31.5
35.0
32.5
Pin Pitch1
(Reference)
L
a
b
5.0±2.0
10.0±5.0
4.5±1.0
7.0±3.0
4.0±1.0
7.0±3.0
26.0
15.0
15.0
22.0
26.0
22.0
30.0
26.0
26.0
40.0
35.0
40.0
Figure
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 5
Pin pitch listed above for reference only. Values not guaranteed.
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LF0003_SCR38 • 10/14/2019
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AC Line Filters – Common Mode SCR Coils, 38 Series
Environmental Compliance
All KEMET AC line filters are RoHS Compliant.
Performance Characteristics
Item
Performance Characteristics
Rated Voltage
250 VAC/VDC and 500 VAC/VDC
Withstanding Voltage
2,400 VAC (2 seconds, between lines)
Insulation Resistance
> 100 MΩ at 500 VDC (between lines)
Rated Current Range
15 – 35 A
Rated Inductance Range
0.85 – 5.00 mH minimum
Inductance Measurement Condition
10 kHz
Thermal Class
E (120°C)
Operating Temperature Range
−25°C to +120°C (include self temperature rise)
Table 1 – Ratings & Part Number Reference
Part Number
Rated
Voltage
AC/DC (V)
Rated
Current
(A)
SCR38-150-1R7A050JH
SCR38-200-2R3A010J
SCR38-350-1R8B008J
SCR38-350-1R8B008JH
SCR38B-200-2R3A010JH
SCR38B-350-1R8B008JH-BK
250
250
250
250
500
500
15
20
35
35
20
35
Inductance DC Resistance/ Temperature
(mH)
Line (mΩ)
Rise (K)
Minimum
Maximum
Maximum
5.00
1.00
0.85
0.85
1.00
0.85
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11.5
3.5
2.6
2.5
3.4
2.7
64
55
65
65
45
68
Wire
Diameter
(mm)
Weight
(g)
Approximate
1.7
2.3
1.8 x 2 Parallel
1.8 x 2 Parallel
2.3
1.8 x 2 Parallel
110.0
110.0
120.0
120.0
113.1
118.4
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AC Line Filters – Common Mode SCR Coils, 38 Series
Frequency Characteristics
1M
SCR38-150-1R7A050JH
1M
10k
10k
Impedance (Ω)
100k
Impedance (Ω)
100k
1k
100
1k
100
10
10
1
1
1k
1M
10k
100k
Frequency (Hz)
1M
10M
1k
30M
SCR38-350-1R8B008J/JH
1M
10k
10k
Impedance (Ω)
100k
Impedance (Ω)
100k
1k
100
10
10k
100k
Frequency (Hz)
1M
10M
30M
1M
10M
30M
SCR38B-200-2R3A010JH
1k
100
10
1
1
1k
1M
SCR38-200-2R3A010J
10k
100k
Frequency (Hz)
1M
10M
30M
10M
30M
1k
10k
100k
Frequency (Hz)
SCR38B-350-1R8B008JH-BK
Impedance (Ω)
100k
10k
1k
100
10
1
1k
10k
100k
Frequency (Hz)
1M
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LF0003_SCR38 • 10/14/2019
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AC Line Filters – Common Mode SCR Coils, 38 Series
Packaging
Type
SCR38-J
SCR38-JH
SCR38B-350-1R8B008JH-BK
Packaging Type
Pieces Per Box
75
Tray
48
Handling Precautions
Precautions for product storage
AC Line Filters should be stored in normal working environments. While the chokes themselves are quite robust in other
environments, solderability will be degraded by exposure to high temperatures, high humidity, corrosive atmospheres, and
long term storage.
KEMET recommends that maximum storage temperature not exceed 40°C and maximum storage humidity not exceed 70%
relative humidity. Atmospheres should be free of chlorine and sulfur bearing compounds. Temperature fluctuations should
be minimized to avoid condensation on the parts. Avoid storage near strong magnetic fields, as this might magnetize the
product.
For optimized solderability, AC line filters stock should be used promptly and preferably within 6 months of receipt.
Product temperature rise values
The values listed for temperature rise are the result of self-heating in wires when the rated current (commercial frequency)
is applied.
When using the product, check and evaluate the value of the core temperature rise under actual operating conditions.
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LF0003_SCR38 • 10/14/2019
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AC Line Filters – Common Mode SCR Coils, 38 Series
KEMET Electronics Corporation Sales Offices
For a complete list of our global sales offi ces, please visit www.kemet.com/sales.
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.
When providing KEMET products and technologies contained herein to other countries, the customer must abide by the procedures and provisions stipulated in all
applicable export laws and regulations, including without limitation the International Traffi c in Arms Regulations (ITAR), the US Export Administration Regulations
(EAR) and the Japan Foreign Exchange and Foreign Trade Act.
KEMET is a registered trademark of KEMET Electronics Corporation.
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