January 2019
EMC Components
3-terminal filters
YFF18AC 1608 [0603 inch] Feed through filter
YFF21AC 2012 [0805 inch] Feed through filter
* Dimensions Code JIS[EIA]
For automotive general use
YFF-AC series
January 2019
EMC Components
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20190115 / 3tf_automotive_general_yff-ac_en.fm
EMC Components
REMINDERS FOR USING THESE PRODUCTS
Before using these products, be sure to request the delivery specifications.
SAFETY REMINDERS
Please pay sufficient attention to the warnings for safe designing when using this products.
1. The products listed in this specification are intended for use in automotive applications under normal operation and usage conditions.
The products are not designed or warranted to meet the requirements of the applications listed below, whose performance and/or qual-
ity requires a more stringent level of safety or reliability, or whose failure, malfunction or defect could cause serious damage to society,
person or property.
Please understand that we are not responsible for any damage or liability caused by use of the products in any of the applications
below or for any other use exceeding the range or conditions set forth in this specification sheet. If you intend to use the products in the
applications listed below or if you have special requirements exceeding the range or conditions set forth in this specification, please
contact us.
(1) Aerospace/aviation equipment
(2) Transportation equipment (electric trains, ships, etc.)
(3) Medical equipment  
(4) Power-generation control equipment
(5) Atomic energy-related equipment
(6) Seabed equipment   
(7) Transportation control equipment
(8) Public information-processing equipment
(9) Military equipment
(10) Electric heating apparatus, burning equipment
(11) Disaster prevention/crime prevention equipment
(12) Safety equipment
(13) Other applications that are not considered general-purpose
applications
When designing your equipment even for general-purpose applications, you are kindly requested to take into consideration securing
protection circuit/device or providing backup circuits in your equipment.
In addition, although the products listed in this specification are intended for use in automotive applications as described above, they
are not prohibited to use in general electronic equipment, whose performance and/or quality doesn’t require a more stringent level of
safety or reliability, or whose failure, malfunction or defect could not cause serious damage to society, person or property. Therefore,
the description of this caution will be applied, when the products are used in general electronic equipment under a normal operation
and usage conditions.
2. We may modify products or discontinue production of a product listed in this catalog without prior notification.
3. We provide “Delivery Specification” that explain precautions for the specifications and safety of each product listed in this catalog. We
strongly recommend that you exchange these delivery specifications with customers that use one of these products.
4. If you plan to export a product listed in this catalog, keep in mind that it may be a restricted item according to the “Foreign Exchange
and Foreign Trade Control Law”. In such cases, it is necessary to acquire export permission in harmony with this law.
5. Any reproduction or transferring of the contents of this catalog is prohibited without prior permission from our company.
6. We are not responsible for problems that occur related to the intellectual property rights or other rights of our company or a third party
when you use a product listed in this catalog. We do not grant license of these rights.
7. This catalog only applies to products purchased through our company or one of our company’s official agencies. This catalog does not
apply to products that are purchased through other third parties.
REMINDERS
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Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use.
Please note that the contents may change without any prior notice due to reasons such as upgrading.
EMC Components
REACH
SVHC-Free
Lead
Free
RoHS
Pb
Halogen
Free
Br
Cl
3-terminal filters
For automotive general use
SERIES OVERVIEW
TDK 3-terminal feed through filter_YFF-AC series is a product which has feed through structure that the direct current goes through inside the com-
ponent. This structure makes the distance from the product to GND shorter and reduces the ESL. Parallel effect by GND electrodes at both sides
provides low ESL.
FEATURES
• Small and high-performance EMC components for automotive appli-
cations. And good attenuation characteristic in wide bandwidth.
• Very effective for the decoupling use. The number of decoupling
MLCCs can be decreased because the impedance is lower than 2-ter-
minal MLCC.
• AEC-Q200 compliant.
APPLICATIONS
• EMC countermeasure and decoupling use in power lines for automo-
tive applications such as ADAS, Autonomous driving system, ECUs,
etc.
SHAPE & DIMENSIONS PRODUCT STRUCTURE
See P-5 to P-6 for details of each dimension.
Overview of the YFF-AC series
W
T
L
B
L
W
T
B
C
Body length
Body width
Body height
Terminal width
GND
terminal width
C
Sn
Ni
Cu
The feed through structure that the direct current goes through inside the
component. This structure makes the distance from the product to GND
shorter and reduces the ESL. Parallel effect by GND electrodes at both
RoHS Directive Compliant Product: See the following for more details. https://product.tdk.com/info/en/environment/rohs/index.html
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Please note that the contents may change without any prior notice due to reasons such as upgrading.
EMC Components
CATALOG NUMBER CONSTRUCTION
(1) Series
(2) Dimensions L x W (mm)
(3) Product internal code
(4) Rated voltage (DC)
(5) Nominal capacitance (pF)
The capacitance is expressed in three digit codes and in units of
pico Farads (pF). The first and second digits identify the first and
second significant figures of the capacitance. The third digit identi-
fies the multiplier.
(Example)101 = 100pF
222 = 2,200pF
105 = 1,000,000pF = 1.0µF
(6) Capacitance tolerance
(7) Packaging style
(8) Internal code
(9) Reel size (mm)
(10) Internal electrode
YFF 18 AC 0J 105 M T 0Y □E
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
Code EIA Length Width Te r m in a l w i d th
18 0603 1.60 0.80 0.25
21 0805 2.00 1.25 0.30
Symbol Description
AC For automotive general use
Code Voltage (DC)
0J 6.3V
1C 16V
1E 25V
1H 50V
Code To l e r a n ce
M ±20%
Code Style
TTaping
Code Description
0Y TDK internal code
Code Size
0ø178
9ø330
Code Description
E, N Ni
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Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use.
Please note that the contents may change without any prior notice due to reasons such as upgrading.
EMC Components
SHAPE & DIMENSIONS RECOMMENDED LAND PATTERN
* Make sure to connect the GND terminal of this product and the GND of the mounting circuit board by using through holes so that the distance between
them is the shortest.
ELECTRICAL CHARACTERISTICS
CHARACTERISTICS SPECIFICATION TABLE
The part numbers are TDK’s standard specification products.
YFF-AC series
YFF18AC type (Feed through filter)
Cutoff
frequency
(MHz)
Insertion loss
30dB bandwidth
(MHz)
Rated voltage
Edc
(V)
Rated current
Idc
(A)
Operating
temperature range
(°C)
Storage temperature
range (After mount)
(°C)
Part No.
0.1 0.23 to 3000 6.3 2 –55 to +125 –55 to +125 YFF18AC0J105MT0Y0E
0.1 0.23 to 3000 6.3 2–55 to +125 –55 to +125 YFF18AC0J105MT0Y9E
0.1 2 to 4000 16 1 –55 to +125 –55 to +125 YFF18AC1C104MT0Y0N
0.1 2 to 4000 16 1–55 to +125 –55 to +125 YFF18AC1C104MT0Y9N
0.3 10 to 3000 25 1 –55 to +125 –55 to +125 YFF18AC1E223MT0Y0N
0.3 10 to 3000 25 1–55 to +125 –55 to +125 YFF18AC1E223MT0Y9N
0.6 20 to 3000 50 1 –55 to +125 –55 to +125 YFF18AC1H103MT0Y0N
0.6 20 to 3000 50 1–55 to +125 –55 to +125 YFF18AC1H103MT0Y9N
1 40 to 3000 50 1 –55 to +125 –55 to +125 YFF18AC1H472MT0Y0N
140 to 3000 50 1–55 to +125 –55 to +125 YFF18AC1H472MT0Y9N
2 90 to 3000 50 1 –55 to +125 –55 to +125 YFF18AC1H222MT0Y0N
290 to 3000 50 1–55 to +125 –55 to +125 YFF18AC1H222MT0Y9N
6 200 to 3000 50 1 –55 to +125 –55 to +125 YFF18AC1H102MT0Y0N
6200 to 3000 50 1–55 to +125 –55 to +125 YFF18AC1H102MT0Y9N
10 400 to 6000 50 1 –55 to +125 –55 to +125 YFF18AC1H471MT0Y0N
10 400 to 6000 50 1–55 to +125 –55 to +125 YFF18AC1H471MT0Y9N
20 800 to 6000 50 1 –55 to +125 –55 to +125 YFF18AC1H221MT0Y0N
20 800 to 6000 50 1–55 to +125 –55 to +125 YFF18AC1H221MT0Y9N
60 1500 to 6000 50 1 –55 to +125 –55 to +125 YFF18AC1H101MT0Y0N
60 1500 to 6000 50 1–55 to +125 –55 to +125 YFF18AC1H101MT0Y9N
100 2000 to 6000 50 1 –55 to +125 –55 to +125 YFF18AC1H470MT0Y0N
100 2000 to 6000 50 1–55 to +125 –55 to +125 YFF18AC1H470MT0Y9N
200 4000 to 6000 50 1 –55 to +125 –55 to +125 YFF18AC1H220MT0Y0N
200 4000 to 6000 50 1–55 to +125 –55 to +125 YFF18AC1H220MT0Y9N
1.000.60
0.40
0.60
0.400.40
Land pattern+Solder resist
Land pattern
Dimensions in mm
0.40
±
0.20 0.25
±
0.20
1.60
±
0.20
2
GND
GND
4
1
IN/OUT
3
OUT/IN
0.80±0.150.60±0.10
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20190115 / 3tf_automotive_general_yff-ac_en.fm
Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use.
Please note that the contents may change without any prior notice due to reasons such as upgrading.
EMC Components
INSERTION LOSS VS. FREQUENCY CHARACTERISTICS
YFF-AC series
YFF18AC type (Feed through filter)
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Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use.
Please note that the contents may change without any prior notice due to reasons such as upgrading.
EMC Components
SHAPE & DIMENSIONS RECOMMENDED LAND PATTERN
* Make sure to connect the GND terminal of this product and the GND of the mounting circuit board by using through holes so that the distance between
them is the shortest.
ELECTRICAL CHARACTERISTICS
CHARACTERISTICS SPECIFICATION TABLE
The part numbers are TDK’s standard specification products.
YFF-AC series
YFF21AC type (Feed through filter)
Cutoff
frequency
(MHz)
Insertion loss
30dB bandwidth
(MHz)
Rated voltage
Edc
(V)
Rated current
Idc
(A)
Operating
temperature range
(°C)
Storage temperature
range (After mount)
(°C)
Part No.
0.1 0.4 to 3000 16 1 –55 to +125 –55 to +125 YFF21AC1C474MT0Y0N
0.1 0.4 to 3000 16 1–55 to +125 –55 to +125 YFF21AC1C474MT0Y9N
0.1 2 to 2500 25 1 –55 to +125 –55 to +125 YFF21AC1E104MT0Y0N
0.1 2 to 2500 25 1–55 to +125 –55 to +125 YFF21AC1E104MT0Y9N
0.1 5 to 2000 25 1 –55 to +125 –55 to +125 YFF21AC1E473MT0Y0N
0.1 5 to 2000 25 1–55 to +125 –55 to +125 YFF21AC1E473MT0Y9N
0.2 10 to 2000 25 1 –55 to +125 –55 to +125 YFF21AC1E223MT0Y0N
0.2 10 to 2000 25 1–55 to +125 –55 to +125 YFF21AC1E223MT0Y9N
0.5 20 to 2000 25 0.4 –55 to +125 –55 to +125 YFF21AC1E103MT0Y0N
0.5 20 to 2000 25 0.4 –55 to +125 –55 to +125 YFF21AC1E103MT0Y9N
1 40 to 2000 50 0.4 –55 to +125 –55 to +125 YFF21AC1H472MT0Y0N
140 to 2000 50 0.4 –55 to +125 –55 to +125 YFF21AC1H472MT0Y9N
2 70 to 2000 50 0.4 –55 to +125 –55 to +125 YFF21AC1H222MT0Y0N
270 to 2000 50 0.4 –55 to +125 –55 to +125 YFF21AC1H222MT0Y9N
5 200 to 2000 50 0.4 –55 to +125 –55 to +125 YFF21AC1H102MT0Y0N
5200 to 2000 50 0.4 –55 to +125 –55 to +125 YFF21AC1H102MT0Y9N
10 400 to 5000 50 1 –55 to +125 –55 to +125 YFF21AC1H471MT0Y0N
10 400 to 5000 50 1–55 to +125 –55 to +125 YFF21AC1H471MT0Y9N
20 700 to 5000 50 1 –55 to +125 –55 to +125 YFF21AC1H221MT0Y0N
20 700 to 5000 50 1–55 to +125 –55 to +125 YFF21AC1H221MT0Y9N
50 1000 to 5000 50 1 –55 to +125 –55 to +125 YFF21AC1H101MT0Y0N
50 1000 to 5000 50 1–55 to +125 –55 to +125 YFF21AC1H101MT0Y9N
100 2000 to 5000 50 1 –55 to +125 –55 to +125 YFF21AC1H470MT0Y0N
100 2000 to 5000 50 1–55 to +125 –55 to +125 YFF21AC1H470MT0Y9N
200 3000 to 5000 50 1 –55 to +125 –55 to +125 YFF21AC1H220MT0Y0N
200 3000 to 5000 50 1–55 to +125 –55 to +125 YFF21AC1H220MT0Y9N
1.400.60
0.50
0.80
0.60 0.65
Land pattern+Solder resist
Land pattern
Dimensions in mm
0.50+0.30,-0.20
2.00
±
0.20
0.30
±
0.20
1.25±0.200.85±0.15
2
GND
GND
4
1
IN/OUT
3
OUT/IN
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Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use.
Please note that the contents may change without any prior notice due to reasons such as upgrading.
EMC Components
INSERTION LOSS VS. FREQUENCY CHARACTERISTICS
YFF-AC series
YFF21AC type (Feed through filter)
0
10
20
30
40
50
60
70
80
90
0.1 1 10 100 1000 10000
Frequency (MHz)
Insertion loss (dB)
1H220M
1H470M
1H101M
1H221M
1H471M
1H102M
1H222M
1H472M
1E103M
1E223M
1E473M
1E104M
1C474M