bobbins (9677242009) part number: 9677242009 77 bobbin 3pc. assembly explanation of part numbers: C?digits 1 & 2 = product class C digits 3 & 4 = material grade ? C last digit 8 = coated bobbin 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 a l and dc bias limits. bobbins in figures 2-5 can be supplied with a uniform thermo- set plastic coating which can withstand a minimum breakdown of 500vrms. this coating will change the dimensions a maximum of 0.5 mm (0.020 ). the last digit of the thermo- set plastic coated part is an 8. ?for any bobbin requirement not listed in the catalog, please contact our customer service group for availability and pricing.? weight: 22 (g) chart legend a l ?: ?inductance factor ? ,?? nl?:?value of dc ampere- turns,??? a w :winding area, n/ awg?:?number of turns/ wire size for test coil electrical properties a l (nh) 88 10% a l min. @ nl (at) 75 - 430 n/ awg 50/18 a w (cm 2 ) 0.69 bobbins are tested for a l value at 1khz < 10 gauss. fair- rite products corp.?? ? ??one commercial row, wallkill, new york 12589-0288 888-324-7748 ?? ? ?? 845-895-2055 ?? ? ?? fax: 845-895-2629 ?? ? ?? ferrites@fair- rite.com ?? ? ??www.fair- rite.com dim mm mm tol nominal inch inch misc. a 24 0.60 0.945 _ b 20 0.70 0.788 _ d 12.5 0.30 0.492 _ f 13 0.30 0.512 _ g 3 0.30 0.118 _ h 3.2 0.10 0.126 _
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