EMI Suppression Beads (2643250202) Part Number: 2643250202 43 SHIELD BEAD Explanation of Part Numbers: Digits 1&2 = product class, 3&4 = material grade and last digit 1= not burnished, 2 = burnished and 4 = Parylene coated. Beads with a 1 as the last digit of the part number are not burnished. Parts that are burnished to break the sharp edges have a 2 as the last digit. Upon request beads can be supplied with a Parylene coating. The last digit of the Parylene coated part is a 4. The minimum coating thickness beads is 0.005 mm (0.0002). Fair- Rite offers a broad selection of ferrite EMI suppression beads with guaranteed minimum impedance specifications. Our Shield Bead Kit (part number 0199000019) contains a selection of these beads. For any EMI suppression bead requirement not listed here, feel free to contact our customer service for availability and pricing. Catalog Drawing 3D Model The C dimension, the bead length, can be modified to suit specific applications. Weight: 2.5 (g) Dim mm mm tol nominal inch inch misc. A 6.35 0.15 0.25 B 2.95 +0.45 0.125 C 25.4 0.75 1 Chart Legend + Test frequency The columnH (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. Typical Impedance () 10 MHz 98 + 25 MHz 148 + 100 MHz 200 250 MHz 223 Electrical Properties H(Oe) 0.91 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 beads are controlled for impedances only. Minimum impedance values are specified for the + marked frequencies. The minimum impedance is listed on our catalog drawing.Suppression beads are controlled for impedances only. Minimum impedance values are specified for the + marked frequencies. The minimum impedance is listed on our catalog drawing. Catalog Drawing Single turn impedance tests for 73 and 43 material beads are performed on the E4990A Impedance Analyzer. The 61 material beads are tested on the E4991A / HP4291B Impedance Analyzer. Beads are tested with the shortest practical wire length. CSV Download Fair- Rite Products Corp. One Commercial Row, Wallkill, New York 12589-0288 888-324-7748 845-895-2055 Fax: 845-895-2629 emailprotected www.fair- rite.com