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001-01 / 20030823 / e9613_acf.fm
EMC Components
ACF Series ACF321825, 451832 Types
3-Terminal Filters for Signal Line and DC Power Line
SMD
FEATURES
鈥?The ACF series are T-type EMC filters incorporating ferrite chip
beads and multilayer ceramic chip capacitors.
鈥?The external structure consists entirely of ferrite, enabling these
parts to achieve superior attenuation characteristics despite
their extremely compact dimensions.
ACF321825 TYPE
SHAPES AND DIMENSIONS/CIRCUIT DIAGRAM
3.2鹵 0.3
Terminal
electrode
鈥?Because they can be mounted on edge, the ACF series are
ideal for high-density circuit configurations.
鈥?Available for reflow soldering.
RECOMMENDED PC BOARD PATTERN
REFLOW SOLDERING
2.5鹵0.25
2
0.6
0.35
Ferrite
GND terminal
GND
2
No polarity
1.94
0.3
1
3
Insulation
resin
1
3
1.8鹵0.2
1.4
0.6
2.2
1.4
Resist
Land pattern
Dimensions in mm
ELECTRICAL CHARACTERISTICS
Part No.
ACF321825-223-T
ACF321825-103-T
ACF321825-682-T
ACF321825-472-T
ACF321825-332-T
ACF321825-222-T
ACF321825-152-T
ACF321825-102-T
ACF321825-681-T
ACF321825-471-T
ACF321825-331-T
ACF321825-221-T
ACF321825-151-T
ACF321825-101-T
ACF321825-680-T
ACF321825-470-T
ACF321825-330-T
ACF321825-220-T
Maximum attenuation
frequency
(MHz)
17
27
37
45
55
65
80
100
120
145
165
200
240
300
370
450
530
650
25dB attenuation
frequency range
(MHz)
11 to 55
17 to 60
22 to 75
30 to 85
37 to 90
45 to 105
60 to 115
80 to 140
95 to 150
120 to 180
130 to 210
170 to 250
205 to 280
265 to 340
340 to 420
420 to 500
500 to 600
600 to 700
Rated voltage Edc Rated current
(V)max.
(mA)max.
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
DC resistance
(鈩?max.
[Terminal No.1 to 3]
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
Insulation resistance
(M鈩?min.
[Terminal No.1 to 2/No.2 to 3]
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
TYPICAL ELECTRICAL CHARACTERISTICS
ATTENUATION vs. FREQUENCY CHARACTERISTICS
0
MEASURING CIRCUIT
S.G.
50鈩?/div>
ACF Series
L.M.
Attenuation (dB)
22
3
10
3
68 47
33
2 2
2
20
30
40
50
1
3
10
30
100
Frequency (MHz)
300
1000
鈥?All specifications are subject to change without notice.
50鈩?/div>
10
0
22
0
330
47
0
681
101
151
22
1
331
471
68
152
2
10
2
22
TDK
1
2
