tyco electronics introduces a new line of surface mountable rfi filters specifically designed to eliminate noise on the signal line. these board level filters attenuate noise on the signal line at the frequency range of 10 mhz to 1000 mhz with maximum attenuation at 40 mhz to 400 mhz. the u shaped ferrite features a parallel first and second leg with a center leg surrounded by a grounding/shorting strap and a capacitor for each line. this unique design optimizes the filter performance by combining the elements into one low profile single piece filter. each filter acts on two signal lines, but can be stacked as an array to allow performance over multiple lines. the blf filter can withstand dielectric voltage of 1000 vac for 60 seconds, thereby allowing placement of this filter at the optimal location, immediately behind the connector. this placement allows immunity protection from signal line interference as well as significant reduction of rfi emissions. the filter can be used in conjunction with unfiltered rj jacks, ganged jacks, or with filtered modular jacks for additional protection. surface mountable rfi filters capacitors: type monolithic ceramic chip standard value: BLF820 820pf blf082 82pf standard tolerance: +/-20% ferrites: type: high resistivity, nickel zinc ceramic inductance: 2 h housing material: glass-filled polyester (ul94v-0) dielectric withstanding voltage: line-to-line and line-to-ground 1000 vac for 60 seconds ratings: 2.2 amps max. 56.6 volts max. 174 catalog 1654001 dimensions are in inches and dimensions are shown for usa cust. svc.: 1-800-468-2023 www.corcom.com revised 05-07 millimeters unless otherwise reference purposes only. corcom prods: 1-847-680-7400 www.tycoelectronics.com specified. values in italics specifications subject germany: 49-89-6089-0 are metric equivalents. to change. blf series blf series corcom product guide specifications electrical schematic pass band minimum insertion loss in db: differential mode in a 50 ohm circuit at 1 mhz <1db at 5mhz < 6db stop band minimum insertion loss in db: common mode in a 50 ohm circuit frequency-mhz model 20 40 70 100 150 300 500 700 1000 blf082 4 10 16 20 25 40 26 23 20 BLF820 20 30 40 50 40 31 25 22 13 part numbers BLF820 blf082 ul recognized dimensions blf line load .25 6.35 gnd pad (4 places) recommended pad layout max. .450 11.43 max. .375 9.53 max. .100 2.54 .100 2.54 .150 3.81 .265 6.73 max. .120 3.05 .050 1.27 .047 1.19 (2 places) .047 1.19 free datasheet http:///
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