FERRITE CHIP EMI COMPONENTS
FERRITE CHIP EMI FILTERS ACF SERIES
FEATURES
SHAPES AND DIMENSIONS
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.
L
Even larger attenuation is possible by using a circuit with
a stabilized ground.
ACF3218 series
18 different suppressors are available, completely
covers 11~700MHz. (25dB attenuation)
0.35
Marking
D
0.35
Insulation resin
Ferrite
Terminations
Ground
termination
unit : mm
Type
ACF321825
L
W
T
D
3.2±0.3 1.8±0.2 2.5±0.25 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
EQUIVALENT CIRCUIT
No directionality
c
a
b
a
GND
unit : mm
Type
a
b
c
PRODUCT IDENTIFICATION
ACF321825 1.4
2.2
0.6
These products are only for reflow soldering.
ACF321825 - 223 - T
(1)
(2) (3)
MEASURING CIRCUIT
(1) Series, Case size
(2) Capacitance
(3) Packaging style T : Taping Ø180mm reel
223 : 22000pF
ACF Series
S.G.
50Ω
L.M.
TL : Taping Ø330mm reel
B : Bulk
CHIP-FILTERS004 1998.1
2