Ferrites and accessories E 25.4/10/7 Core Series/Type: B66315 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 25.4/10/7 Core B66315 Size based on US lam. size E cores US designation E2425 E cores with high permeability for common-mode chokes and broadband applications Delivery mode: single units Magnetic characteristics (per set) 1 l/A = 1.27 mm l = 49.2 mm e 2 A = 38.8 mm e 2 A = 38.4 mm min 3 V = 1910 mm e Approx. weight 9.6 g/set Ungapped Material A value P Ordering code L e V nH W/set N30 2700 +30/20% 2720 B66315G0000X130 T46 8500 30% 8570 B66315F0000X146 N27 1500 +30/20% 1510 < 0.36 (200 mT, 25 kHz, 100 C) B66315G0000X127 N87 1670 +30/20% 1690 < 1.00 (200 mT, 100 kHz, 100 C) B66315G0000X187 Gapped Material g A value Ordering code L e approx. mm nH N27 0.500.05 122 123 B66315G0500X127 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 75 0.707 106 0.847 97 0.865 N87 75 0.707 106 0.796 94 0.873 Validity range: K1, K2: 0.10 mm < s < 2.00 mm K3, K4: 50 nH < A < 500 nH L Please read Cautions and warnings and 2 06/13 Important notes at the end of this document.