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. acf3218 series 18 different suppressors are available, completely covers 11~700mhz. (25db attenuation) emc control for high speed digital circuit like a clock line and rgb lines. emc control for all digital circuit with a stabilized ground. acf321825 - 223 - t (1) (2) (3) (1) series, case size (2) capacitance 223 : 22000pf (3) packaging style t : taping ? 180mm reel tl : taping ? 330mm reel b : bulk a b a c 1.94 ferrite chip emi filters acf series features shapes and dimensions application product identification equivalent circuit recommended patterns on pc board gnd no directionality unit : mm type l w t d acf321825 3.20.3 1.80.2 2.50.25 0.6 chip-filters004 1998.1 2 ferrite chip emi components unit : mm type a b c acf321825 1.4 2.2 0.6 these products are only for reflow soldering. marking insulation resin terminations termination ferrite 0.35 0.35 l 0.3 t w d ground measuring circuit s.g. 50 ? acf series l.m. 50 ?
packaging styles are added at the end of a tdk item. (t:taping ? 180mm reel, tl:taping ? 330mm reel, b:bulk) see product identification above, (3). chip-filters004 1998.1 4 electrical characteristics (acf321825 series) temp. -40c to +125c dc resistance : 0.15( ? ) max. , rated voltage : dc 50(v) max. , rated current : dc 300(ma) max. insertion loss vs. frequency characteristics(acf321825 series) part no. marking capacitance max. attenuation 25db attenuation (pf) frequency frequency range (mhz) (mhz) acf321825-223 223 22000 17 11 ~ 55 acf321825-103 103 10000 27 17 ~ 60 acf321825-682 682 6800 37 22 ~ 75 acf321825-472 472 4700 45 30 ~ 85 acf321825-332 332 3300 55 37 ~ 90 acf321825-222 222 2200 65 45 ~ 105 acf321825-152 152 1500 80 60 ~ 115 acf321825-102 102 1000 100 80 ~ 140 acf321825-681 681 680 120 95 ~ 150 acf321825-471 471 470 145 120 ~ 180 acf321825-331 331 330 165 130 ~ 210 acf321825-221 221 220 200 170 ~ 250 acf321825-151 151 150 240 205 ~ 280 acf321825-101 101 100 300 265 ~ 340 acf321825-680 680 68 370 340 ~ 420 acf321825-470 470 47 450 420 ~ 500 acf321825-330 330 33 530 500 ~ 600 acf321825-220 220 22 650 600 ~ 700 1 10 100 1000 frequency(mhz) insertion loss(db) 223 103 682 472 332 222 152 102 681 471 331 221 151 101 680 470 330 220 10 20 30 40 50 0
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