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001-01 / 20030823 / e9613_acf.fm
ACF Series ACF321825, 451832 Types
EMC Components
3-Terminal Filters for Signal Line and DC Power Line
SMD
FEATURES
• The ACF series are T-type EMC filters incorporating ferrite chip
beads and multilayer ceramic chip capacitors.
• The external structure consists entirely of ferrite, enabling these
parts to achieve superior attenuation characteristics despite
their extremely compact dimensions.
• Because they can be mounted on edge, the ACF series are
ideal for high-density circuit configurations.
• Available for reflow soldering.
ACF321825 TYPE
SHAPES AND DIMENSIONS/CIRCUIT DIAGRAM
RECOMMENDED PC BOARD PATTERN
REFLOW SOLDERING
3.2 0.3
Terminal
electrode
1
3
Insulation
resin
1
3
2
GND
2
0.6 0.35
Resist
No polarity
0.6
Land pattern
Ferrite
1.4
2.2
1.4
Dimensions in mm
GND terminal
ELECTRICAL CHARACTERISTICS
Maximum attenuation 25dB attenuation
DC resistance
(Ω)max.
Insulation resistance
Rated voltage Edc Rated current
Part No.
frequency
(MHz)
17
frequency range
(MHz)
11 to 55
(MΩ)min.
(V)max.
(mA)max.
[Terminal No.1 to 3] [Terminal No.1 to 2/No.2 to 3]
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
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
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
ACF321825-223-T
ACF321825-103-T
27
17 to 60
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
37
45
55
65
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
80
100
120
145
165
200
240
300
370
450
530
650
TYPICAL ELECTRICAL CHARACTERISTICS
ATTENUATION vs. FREQUENCY CHARACTERISTICS
MEASURING CIRCUIT
S.G.
50Ω
ACF Series
L.M.
0
10
20
30
40
50
1
3
10
30
100
300
1000
(
)
Frequency MHz
• All specifications are subject to change without notice.