• All specifications are subject to change without notice.
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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
• 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
ELECTRICAL CHARACTERISTICS
TYPICAL ELECTRICAL CHARACTERISTICS
ATTENUATION vs. FREQUENCY CHARACTERISTICS MEASURING CIRCUIT
3.2
±
0.3
2.5±0.25
0.3
Insulation
resin
Terminal
electrode
0.6
1.8±0.2
0.35
13
2
No polarity
3
1
2
GND terminal
Ferrite
GND
Resist
Land pattern
Dimensions in mm
1.4
2.2 1.4
0.6
1.94
Part No.
Maximum attenuation
frequency
(MHz)
25dB attenuation
frequency range
(MHz)
Rated voltage Edc
(V)max.
Rated current
(mA)max.
DC resistance
(Ω)max.
[Terminal No.1 to 3]
Insulation resistance
(MΩ)min.
[Terminal No.1 to 2/No.2 to 3]
ACF321825-223-T
17 11 to 55 20 300 0.15 1000
ACF321825-103-T 27 17 to 60 20 300 0.15 1000
ACF321825-682-T 37 22 to 75 20 300 0.15 1000
ACF321825-472-T 45 30 to 85 20 300 0.15 1000
ACF321825-332-T 55 37 to 90 20 300 0.15 1000
ACF321825-222-T 65 45 to 105 20 300 0.15 1000
ACF321825-152-T 80 60 to 115 20 300 0.15 1000
ACF321825-102-T 100 80 to 140 20 300 0.15 1000
ACF321825-681-T 120 95 to 150 20 300 0.15 1000
ACF321825-471-T 145 120 to 180 20 300 0.15 1000
ACF321825-331-T 165 130 to 210 20 300 0.15 1000
ACF321825-221-T 200 170 to 250 20 300 0.15 1000
ACF321825-151-T 240 205 to 280 20 300 0.15 1000
ACF321825-101-T 300 265 to 340 20 300 0.15 1000
ACF321825-680-T 370 340 to 420 20 300 0.15 1000
ACF321825-470-T 450 420 to 500 20 300 0.15 1000
ACF321825-330-T 530 500 to 600 20 300 0.15 1000
ACF321825-220-T 650 600 to 700 20 300 0.15 1000
ACF Series L.M.S.G.
50Ω
50Ω
Attenuation
(
dB
)
50
40
30
20
10
0
1000100 30010 3013
223
103
682
472
3
3
2
222
152
102
681
471
331
221
151
101
680
470
330
220
Frequency
(
MHz
)
