Fair-Rite Product's Catalog Part Data Sheet, 9677182208 Printed: 2015-02-12 Fair-Rite Products Corp. PO Box J,One Commercial Row, Wallkill, NY 12589-0288 Phone: (888) 324-7748 www.fair-rite.com Part Number: 9677182208 Frequency Range: Power Applications Description: 77 BOBBIN 3PC. ASSEMBLY COATED Application: Inductive Components Where Used: Open Magnetic Circuit Part Type: Bobbins Mechanical Specifications Weight: 14.000 (g) Part Type Information Bobbins are an economical and well-proven core design for many applications where relatively low but stable inductance values are required. -For higher frequency designs, use small bobbins in 43 material. -For power applications, bobbins in 77 material are specified for AL and dc bias limits. -Bobbins in Figures 2-5 can be supplied with a uniform coating of thermo-set plastic coating which can withstand a minimum breakdown of 500Vrms. This coating will change the dimensions a maximum of 0.5mm (.020''). The last digit of the thermo-set plastic coated part is an '8'. -The listed dimensions are for assembled bobbins without thermo-set plastic. -Bobbins are tested for AL value at 1kHz < 10 gauss. -For any bobbin requirement not listed in the catalog, please contact our customer service group for availability and pricing. -Explanation of Part Numbers: Digits 1&2 = product class, 3&4 = material grade, last digit 8 = coated bobbin. Fair-Rite Product's Catalog Part Data Sheet, 9677182208 Printed: 2015-02-12 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 Dim mm A B C D E F G H J K 18.95 23.20 13.65 11.80 1.70 2.60 - mm nominal inch tol inch misc. Max Max Min Max Min Min - 0.746 0.913 0.538 0.464 0.067 0.103 - Max Max Min Max Min Min - Electrical Specifications Typical Impedance ( ) W X Y Z - - - ref - - Winding Information Turns Wire 1st Wire 2nd Wire Tested Size Length Length - - - - Reel Information Tape Width Pitch Parts 7 '' Parts 13 '' Parts 14 '' mm mm Reel Reel Reel - - - - - Package Size Pkg Size Electrical Properties (-) AL (nH) 65 ±10% ALmin. @ Nl (At) 55 - 410 N/AWG 95/22 # Holes # Rows 0.42 Min - - Aw (cm2) Connector Plate 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 ½ turn is defined as a single pass through a hole. l/A - Core Constant Ae : Effective Cross-Sectional Area L AL - Inductance Factor (__ N 2) N/AWG - Number of Turns/Wire Size for Test Coil l e : Effective Path Length Ve : Effective Core Volume Nl - Value of dc Ampere-turns Fair-Rite Product's Catalog Part Data Sheet, 9677182208 Printed: 2015-02-12 Fair-Rite Products Corp. PO Box J,One Commercial Row, Wallkill, NY 12589-0288 Phone: (888) 324-7748 www.fair-rite.com See next page for further material specifications. Fair-Rite Product's Catalog Part Data Sheet, 9677182208 Printed: 2015-02-12 Fair-Rite Products Corp. PO Box J,One Commercial Row, Wallkill, NY 12589-0288 Phone: (888) 324-7748 www.fair-rite.com Fair-Rite Product's Catalog Part Data Sheet, 9677182208 Printed: 2015-02-12 Fair-Rite Products Corp. PO Box J,One Commercial Row, Wallkill, NY 12589-0288 Phone: (888) 324-7748 www.fair-rite.com