Fair-Rite Products Corp.United States

Part Number: 2631302502 31 ROUND CABLE CORE – Digits 1 & 2 = Product Class – Digits 3 & 4 = Material Grade – Last digit 2 = Burnished (All cable cores have been burnished to remove the sharp edges) Fair-Rite offers a broad selection of ferrite EMI suppression cable cores in several materials with guaranteed minimum impedance specifications. For smaller suppression parts, refer to the section EMI Suppression Beads. Our Expanded Cable and Suppressor Kit (part number 0199000005) contains a selection of these suppression cores. The C dimension, the core length, can be modified to suit specific applications. 4.69 (g) + Test frequency The column “H (Oe)” gives for each bead the calculated dc bias field in oersted for 1 turn and 1 ampere direct current. The actual dc H field in the application is this value of “H” times the actual NI (ampere-turn) product. For the effect of the dc bias on the impedance of the bead material, see figures 18-23 in the application note “How to choose Ferrite Components for EMI Suppression”. Suppression cable cores are controlled for impedances only. Minimum impedance values are specified for the + marked frequencies. The minimum impedance is typically the listed impedance less 20%. Single turn impedance tests for 31, 43 and 46 material cores are performed on the E4991A/HP4291B Impedance Analyzer. The 61 material parts are tested on the E4991A / HP4291B Impedance Analyzer and 75 material parts are tested on the E4990A Impedance Analyzer. Cores are tested with the shortest practical wire length. A MnZn ferrite designed specifically for EMI suppression applications from as low as 1 MHz up to 500 MHz. This material does not have the dimensional resonance limitations associated with conventional MnZn ferrite materials. Round Cable EMI Suppression Cores Round Cable Snap-Its Flat Cable EMI Suppression Cores Flat Cable Snap-Its **** Characteristic curves are measured on standard Toroids (18/10/6 mm) at 25°C and 10 kHz unless otherwise indicated. Impedance characteristics are measured on standard shield beads (3.5/1.3/6.0 mm) unless otherwise indicated.