Ferrites and accessories ETD 59/31/22 Core and accessories Series/Type: B66397, B66398 Date: October 2022 TDK Electronics AG 2022. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without TDK Electronics’ prior express consent is prohibited.
ETD 59/31/22 Core B66397 To IEC 63093-6 For SMPS transformers with optimum weight/performance ratio at small volume Delivery mode: single units Magnetic characteristics (per set) l/A le Ae Amin Ve = 0.38 mm–1 = 139 mm = 368 mm2 = 368 mm2 = 51200 mm3 Approx. weight 260 g/set Ungapped Material AL value nH e BS mT PV W/set Ordering code N27 5000 +30/–20% 1500 3201) < 9.62 (200 mT, 25 kHz, 100 °C) B66397G0000X127 N87 5300 +30/–20% 1590 3201) < 5.
ETD 59/31/22 Core B66397 Calculation factors (for formulas, see “E cores: general information” ) 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 Material 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 Processing notes, 2.1 Yoke Material: Stainless spring steel (0.
Ferrites and accessories Cautions and warnings 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 temperature changing or tensile load.
Ferrites and accessories Cautions and warnings Display of ordering codes for TDK Electronics products The ordering code for one and the same product can be represented differently in data sheets, data books, other publications, on the company website or in order-related documents such as shipping notes, order confirmations and product labels. The varying representations of the ordering codes are due to different processes employed and do not affect the specifications of the respective products.
Ferrites and accessories Symbols and terms Symbols and terms Symbol Meaning Unit A Ae AL AL1 Amin AN AR B B B̂ B̂ BDC BR BS C0 CDF DF d Ea f fcutoff fmax fmin fr fCu g H Ĥ HDC Hc h h/i 2 I IDC Î J k k3 k3c L Cross section of coil Effective magnetic cross section Inductance factor; AL = L/N2 Minimum inductance at defined high saturation ( a) Minimum core cross section Winding cross section Resistance factor; AR = RCu /N2 RMS value of magnetic flux density Flux density deviation Peak value of magnet
Ferrites and accessories Symbols and terms Symbol Meaning Unit L/L L0 LH Lp Lrev Ls le lN N PCu Ptrans PV PF Q R RCu Rh Rh Ri Rp Rs Rth RV s T T TC t tv tan tanL tanr tane tanh tan/i U Û Ve Z Zn Relative inductance change Inductance of coil without core Main inductance Parallel inductance Reversible inductance Series inductance Effective magnetic path length Average length of turn Number of turns Copper (winding) losses Transferrable power Relative core losses Performance factor Quality
Ferrites and accessories Symbols and terms Symbol Meaning Unit F e r B i s 0 a app e i p' p" r rev s' s" tot Temperature coefficient (TK) Relative temperature coefficient of material Temperature coefficient of effective permeability Relative permittivity Magnetic flux Efficiency of a transformer Hysteresis material constant Hysteresis core constant Magnetostriction at saturation magnetization Relative complex permeability Magnetic field constant Relative amplitude permeabili
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.
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