FERRITE CHIP EMI COMPONENTS
FERRITE CHIP EMI FILTERS
ACF
SERIES
FEATURES
The ACF series is a T-type EMI filter family with 2 beads
and 1 capacitor packed into 1 single chip.
High attenuation in a small case size is possible due to
a magnetic shield structure.
Even larger attenuation is possible by using a circuit with
a stabilized ground.
SHAPES AND DIMENSIONS
L
ACF3218 series
18 different suppressors are available, completely
covers 11~700MHz. (25dB attenuation)
0.35
D
Marking
0.35
Insulation resin
W
Ferrite Ground
termination
Type
ACF321825
L
3.2±0.3
W
1.8±0.2
Terminations
unit : mm
T
2.5±0.25
D
0.6
APPLICATION
EMC control for high speed digital circuit like a clock
line and RGB lines.
EMC control for all digital circuit with a stabilized ground.
RECOMMENDED PATTERNS
ON PC BOARD
1.94
a
Type
ACF321825
EQUIVALENT CIRCUIT
No directionality
GND
c
b
a
1.4
b
2.2
a
unit : mm
c
0.6
PRODUCT IDENTIFICATION
ACF321825 - 223 - T
(1)
(2) (3)
(1) Series, Case size
(2) Capacitance
223 : 22000pF
(3) Packaging style T : Taping
Ø180mm
reel
TL : Taping
Ø330mm
reel
B : Bulk
These products are only for reflow soldering.
MEASURING CIRCUIT
S.G.
50Ω
50Ω
ACF Series
L.M.
CHIP-FILTERS004 1998.1
0.3
T
2
ELECTRICAL CHARACTERISTICS (ACF321825 SERIES)
Temp. -40C to +125C DC resistance : 0.15(Ω) max. , Rated voltage : DC 50(V) max. , Rated current : DC 300(mA) max.
Part No.
Marking
ACF321825-223
ACF321825-103
ACF321825-682
ACF321825-472
ACF321825-332
ACF321825-222
ACF321825-152
ACF321825-102
ACF321825-681
ACF321825-471
ACF321825-331
ACF321825-221
ACF321825-151
ACF321825-101
ACF321825-680
ACF321825-470
ACF321825-330
ACF321825-220
223
103
682
472
332
222
152
102
681
471
331
221
151
101
680
470
330
220
Capacitance Max. attenuation 25dB attenuation
(pF)
frequency
frequency range
(MHz)
(MHz)
22000
17
11 ~ 55
10000
27
17 ~ 60
6800
37
22 ~ 75
4700
45
30 ~ 85
3300
55
37 ~ 90
2200
65
45 ~ 105
1500
80
60 ~ 115
1000
100
80 ~ 140
680
120
95 ~ 150
470
145
120 ~ 180
330
165
130 ~ 210
220
200
170 ~ 250
150
240
205 ~ 280
100
300
265 ~ 340
68
370
340 ~ 420
47
450
420 ~ 500
33
530
500 ~ 600
22
650
600 ~ 700
Packaging styles are added at the end of a TDK item.
(T:Taping
Ø180mm
Reel, TL:Taping
Ø330mm
Reel, B:Bulk)
See product identification above, (3).
INSERTION LOSS vs. FREQUENCY CHARACTERISTICS(ACF321825 SERIES)
0
10
682
Insertion loss(dB)
223
103
472
332
222
102
681
151
101
680
152
331
221
470
20
30
40
50
1
10
Frequency(MHz)
100
1000
CHIP-FILTERS004 1998.1
471
330
220
4
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