Fair-Rite Product s Catalog Part Data Sheet, 4077485111 Printed: 2013-07-03 Fair-Rite Products Corp. PO Box J,One Commercial Row, Wallkill, NY 12589-0288 Phone: (888) 324-7748 www.fair-rite.com Part Number: 4077485111 Frequency Range: Medium Permeability, 77 (ui=2000) & 78 (ui=2300) materials Description: 77 ROD Application: Inductive Components Where Used: Open Magnetic Circuit Part Type: Rods Mechanical Specifications Weight: 18.000 (g) Part Type Information Pressed Fair-Rite rods are used extensively in high-energy storage designs. These rods can also be used for inductive components that require temperature stability or have to accommodate large dc bias requirements. -The A dimension can be centerless ground to tighter tolerances. -Figure 2 rods have a 0.6 mm (.024 ) maximum chamfer on the end faces. -For frequency tuned rod designs see section Antenna/RFID Rods. -For any rod requirement not listed here, feel free to contact our customer service group for availability and pricing.Fair-Rite Product s Catalog Part Data Sheet, 4077485111 Printed: 2013-07-03 Fair-Rite Products Corp. PO Box J,One Commercial Row, Wallkill, NY 12589-0288 Phone: (888) 324-7748 www.fair-rite.com Mechanical Specifications Land Patterns V W X Y Z Dim mm mm nominal inch ref tol inch misc. - - - - - A 12.30 0.40 0.485 - - - - - - B - - - - Winding Information C 31.75 0.75 1.250 - Turns Wire 1st Wire 2nd Wire D - - - - E - - - - Tested Size Length Length F - - - - - - - - G - - - - H - - - - Reel Information J - - - - Tape Width Pitch Parts 7 Parts 13 Parts 14 K - - - - mm mm Reel Reel Reel Electrical Specifications - - - - - Typical Impedance ( ) Package Size Pkg Size Electrical Properties - (-) Connector Plate Holes Rows - - Legend + Test frequency Preferred parts, the suggested choice for new designs,have shorter lead times and are more readily available. 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. A turn is defined as a single pass through a hole. l/A - Core Constant l : Effective Path Length e A : Effective Cross-Sectional Area V : Effective Core Volume e e L A - Inductance Factor ( ) Nl - Value of dc Ampere-turns 2 N L N/AWG - Number of Turns/Wire Size for Test Coil