Fair-Rite Product's Catalog Part Data Sheet, 9578293202 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: 9578293202 Frequency Range: Dimensions Description: 78 ETD CORE Application: Inductive Components Where Used: Closed Magnetic Circuit Part Type: ETD Cores Generic Name: ETD29 Mechanical Specifications Weight: 28.000 (g) per Set Part Type Information ETD29, ETD34, ETD39, ETD44, ETD49, ETD54, ETD59 ETD cores have been designed to make optimum use of a given volume of ferrite material for maximum throughput power, specifically for forward converter transformers. The structure, which includes a round center post, approaches a nearly uniform cross-sectional area throughout the core and provides a winding area that minimizes winding losses. ETD cores are used mainly in switched-mode power supplies and permit off-line designs where IEC and VDE isolation requirements must be met. -ETD cores can be supplied with the centerpost gapped to a mechanical dimension or an AL value. -AL value is measured at 1 kHz, B < 10 gauss. -Weight indicated is per pair or set. Fair-Rite Product's Catalog Part Data Sheet, 9578293202 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 Dim mm A B C D E F G H J K 29.80 15.80 9.50 11.00 22.00 9.50 - mm nominal inch tol inch misc. ± 0.6 ± 0.2 ± 0.3 ± 0.2 min ± 0.3 - 1.173 0.622 0.374 0.433 0.866 0.374 - 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) 2200 ±25% Ae(cm2 ) 0.76700 -1 l/A(cm ) l e (cm) 3 (-) Connector Plate 9.50 # Holes # Rows 7.07 - - Ve (cm ) 5.41800 Amin (cm2) .709 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, 9578293202 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 See next page for further material specifications. Fair-Rite Product's Catalog Part Data Sheet, 9578293202 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 Fair-Rite Product's Catalog Part Data Sheet, 9578293202 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