Ferrites and accessories E 70/33/32 Core and accessories Series/Type: B66371, B66372 Date: June 2013 Data SheetData Sheet EPCOS AG 2015. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without EPCOS prior express consent is prohibited. EPCOS AG is a TDK Group Company. E 70/33/32 Core B66371 Delivery mode: single units Magnetic characteristics (per set) 1 l/A = 0.22 mm l = 149 mm e 2 A = 683 mm e 2 A = 676 mm min 3 V = 102000 mm e Approx. weight 514 g/set Ungapped Mate- A value B * P Ordering code L e S V rial nH mT W/set N27 8850 +30/20% 1530 320 < 19.00 (200 mT, 25 kHz, 100 C) B66371G0000X127 N87 9700 +30/20% 1700 320 < 9.50 (100 mT, 100 kHz, 100 C) B66371G0000X187 * H = 250 A/m f = 10 kHz T = 100 C Gapped Material g A value Ordering code L e approx. mm nH N27 1.500.05 655 113 B66371G1500X127 The A value in the table applies to a core set comprising one ungapped core (dimension g = 0) and L one gapped core (dimension g > 0). Calculation factors (for formulas, see E cores: general information ) Material Relationship between Calculation of saturation current air gap A value L K1 (25 C) K2 (25 C) K3 (25 C) K4 (25 C) K3 (100 C) K4 (100 C) N27 903 0.789 1568 0.847 1470 0.865 N87 903 0.789 1485 0.796 1438 0.873 Validity range: K1, K2: 0.20 mm < s < 5.00 mm K3, K4: 290 nH < A < 2880 nH L Please read Cautions and warnings and 2 06/13 Important notes at the end of this document.