January 2019
EMC Components
3-terminal filters
YFF31AH 3216 [1206 inch]* Feed through filter
* Dimensions Code JIS[EIA]
For automotive large-current power line
YFF-AH series
January 2019
EMC Components
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20190115 / 3tf_automotive_power_yff-ah_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.
Do not use or store in locations where there are conditions such as gas corrosion (salt, acid, alkali, etc.).
Before soldering, be sure to preheat components.
The preheating temperature should be set so that the temperature difference between the solder temperature and product temperature
does not exceed 150°C.
Soldering corrections after mounting should be within the range of the conditions determined in the specifications.
If overheated, a short circuit, performance deterioration, or lifespan shortening may occur.
Self heating (temperature increase) occurs when the power is turned ON, so the tolerance should be sufficient for the set thermal
design.
Do not use for a purpose outside of the contents regulated in the delivery specifications.
The products listed on this catalog are intended for use in automotive electronic equipment under a normal operation and use condi-
tion.
The products are not designed or warranted to meet the requirements of the applications listed below, whose performance and/or qual-
ity require a more stringent level of safety or reliability, or whose failure, malfunction or trouble could cause serious damage to society,
person or property.
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 the each catalog, 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 pro-
tection circuit/device or providing backup circuits in your equipment.
REMINDERS
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20190115 / 3tf_automotive_power_yff-ah_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
3-terminal filters
For automotive large-current power line
FEATURES
Compact and high-performance EMC countermeasure components specialized for in-vehicle applications Also demonstrates an excel-
lent effect for decoupling use
Compliant with AEC-Q200
Good attenuation characteristic in wide bandwidth.
Supports large current (6 to 10 A)
APPLICATION
EMC countermeasure and decoupling in power lines for various in-vehicle electronic equipment such as ECUs, car navigation systems, in-
vehicle camera systems, millimeter wave radar systems, etc.
PART NUMBER CONSTRUCTION
PACKAGING STYLE AND SPECIFICATIONS
Overview of the YFF-AH series
YFF 31 AH 2A 105 M T 0Y □N
Series
name
L x W
dimensions Product internal code
Rated
voltage Capacitance Tolerance Taping Internal
code
Reel size Internal
electrode
Ni
(mm) (V) (pF) (mm)
31 3.2×1.6
AH
For automotive
large-current
power line
2A 100 104 100,000
(0.1µF) M±20％0 ø178
105 1,000,000
(1µF) 9 ø330
Type Package quantity (piece/reel) Individual weight
ø178 ø330 (g)
YFF31AH 2,000 10,000 0.0342
Product compatible with RoHS directive
Lead-free compatible
RoHS Directive Compliant Product: See the following for more details. https://product.tdk.com/info/en/environment/rohs/index.html
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20190115 / 3tf_automotive_power_yff-ah_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
RECOMMENDED SOLDERING CONDITION
REFLOW SOLDERING
HAND SOLDERING
PRECAUTIONS FOR HANDLING
Before soldering, be sure to preheat components. The T pre-
heating temperature must be 150°C max. with attention paid to
thermal shock.
Natural cooling of components in the air is recommended. On
the other hand, when dipping them in a solvent for purposes,
such as cleaning, make sure that the temperature difference
(T) is 100°C.
When performing hand soldering for circuit modification, apply
the soldering iron to the copper foil area of the printed circuit
board for 3 seconds or less. The temperature of the iron tip
should not exceed 300°C.
Use a wrist band to discharge static electricity in your body
through the grounding wire.
When incorporating the printed circuit board on which this prod-
uct is mounted into a frame, etc., do not apply stress to the prod-
uct through local bending of the board by tightening of screws,
etc.
Overview of the YFF-AH series
Preheating
Soldering
Slow cooling
(Natural cooling)
60 seconds or more
0
260˚C max.
10s max.
Temperature(˚C)
150˚C max.
Preheating
300
Make as short as possilble (within three seconds)
0
Temperature(˚C)
150˚C max.
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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.
INSERTION LOSS VS. FREQUENCY CHARACTERISTICS ELECTRICAL CURRENT RATING DERATING
YFF-AH series
YFF31AH type (Feed through filter)
Insertion loss
40dB frequency range
(MHz)
Rated voltage
Edc
(V)
Rated current
Idc
(A)
Operating
temperature range
(°C)
Storage temperature
range (After mount)
(°C)
Part No.
0.8 to 2000 100 DC6A/105°C
DC4A/125°C –55 to +125 –55 to +125 YFF31AH2A105MT0Y0N
0.8 to 2000 100 DC6A/105°C
DC4A/125°C –55 to +125 –55 to +125 YFF31AH2A105MT0Y9N
7 to 2000 100 DC10A/105°C
DC6A/125°C –55 to +125 –55 to +125 YFF31AH2A104MT0Y0N
7 to 2000 100 DC10A/105°C
DC6A/125°C –55 to +125 –55 to +125 YFF31AH2A104MT0Y9N
1.20±0.30 0.10min.
3.20±0.20
1.60±0.201.30±0.20
2
GND
GND
4
1
IN/OUT
3
OUT/IN
2.501.20
1.40
1.30
0.80 0.90
Land pattern+Solder resist
Land pattern
Dimensions in mm
0
10
20
30
40
50
60
70
80
900.1 1 10 100 1000 10000
Frequency(MHz)
Insertion Loss(dB)
2A105M
2A104M
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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
REEL DIMENSIONS
Unit: mm
TAPE DIMENSIONS
Plastic tape
Unit: mm
YFF-AH series Packaging style
Reel A B C D E W t r
ø178 ø178±2.0 ø60±2.0 ø13±0.5 ø21±0.8 2.0±0.5 9.0±0.3 2.0±0.5 1.0
ø330 ø382 max.(ø330 nom.) ø50 min. ø13±0.5 ø21±0.8 2.0±0.5 10.0±1.5 2.0±0.5 1.0
Ty p e A B C D E F G H J K t Q
YFF31AH 1.9 typ. 3.5 typ. 8.0±0.3 3.5±0.05 1.75±0.1 4.0±0.1 2.0±0.05 4.0±0.1 ø1.5+0.1/–0 2.5 max. 0.3 max. ø0.5 min.
A
C
E
D
r
B
Wt
ED
C
B
Round sprocket holes Square punch hole for component mountingJ
t
K
AHGF Q