Ferrites and accessories ETD 59/31/22 Core and accessories Series/Type: B66397, B66398 %BUB 4IFFU September 2006, December 2008 Date: © EPCOS AG 2006. Reproduction, publication and dissemination of this data sheet, enclosures hereto and the information contained therein without EPCOS’ prior express consent is prohibited.
ETD 59/31/22 B66397 31,2 _ 0,4 ■ To IEC 61185 ■ For SMPS transformers with optimum weight/performance ratio at small volume ■ Delivery mode: single units 22+0,9 Core Magnetic characteristics (per set) = 0.38 mm–1 = 139 mm = 368 mm2 = 368 mm2 = 51200 mm3 22,1_ 0,9 22,1_ 0,9 Σl/A le Ae Amin Ve Approx. weight 260 g/set 43,6+2,2 59,8±1,4 FEK0066-5 Ungapped Material AL value nH μe PV W/set Ordering code N27 5000 +30/–20% 1500 < 9.
ETD 59/31/22 Core B66397 Calculation factors (for formulas, see “E cores: general information”) Material Relationship between air gap – AL value Calculation of saturation current K1 (25 °C) K2 (25 °C) K3 (25 °C) K4 (25 °C) K3 (100 °C) K4 (100 °C) N27 508 –0.708 853 –0.847 799 –0.865 N87 508 –0.708 812 –0.796 783 –0.873 Validity range: K1, K2: 0.10 mm < s < 3.50 mm K3, K4: 170 nH < AL < 1660 nH Please read Cautions and warnings and Important notes at the end of this document.
ETD 59/31/22 Accessories B66398 Coil former Material: GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085: H max. operating temperature 180 °C), color code black Rynite FR 530 ® [E41938 (M)], E I DUPONT DE NEMOURS & CO INC Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s Winding: see Data Book 2007, chapter “Processing notes, 2.1” Yoke Material: Stainless spring steel (0.
Ferrites and accessories Cautions and warnings Mechanical stress and mounting Ferrite cores have to meet mechanical requirements during assembling and for a growing number of applications. Since ferrites are ceramic materials one has to be aware of the special behavior under mechanical load. As valid for any ceramic material, ferrite cores are brittle and sensitive to any shock, fast changing or tensile load.
Important notes The following applies to all products named in this publication: 1. Some parts of this publication contain statements about the suitability of our products for certain areas of application. These statements are based on our knowledge of typical requirements that are often placed on our products in the areas of application concerned.
