Ferrites and accessories ER 42/22/15 Core Series/Type: B66347 Date: May 2017 EPCOS AG 2017. 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. ER 42/22/15 Core B66347 Round center leg particularly suitable for use of thick winding wires or tapes For compact winding design with low leakage inductance Delivery mode: single units Magnetic characteristics (per set) 1 l/A= 0.58 mm l = 99 mm e 2 A = 170 mm e 2 A = 170 mm min 3 V = 16800 mm e Approx. weight 84 g/set Ungapped Material A value B * P Ordering code L e S V nH mT W/set N27 3200 +30/20% 1480 320 < 3.1 (200 mT, 25 kHz, 100 C) B66347G0000X127 N87 3700 +30/20% 1710 320 < 9.0 (200 mT, 100 kHz, 100 C) B66347G0000X187 * H = 250 A/m f = 10 kHz T = 100 C Gapped (A values/air gaps examples) L Material g A value Ordering code L e approx. mm nH N27 1.00 0.05 257 119 B66347G1000X127 The A value in the table applies to a core set comprising one ungapped core (dimension g = 0 mm) L and one gapped core (dimension g > 0 mm). Other A values/air gaps and materials available on request see Processing remarks on page 3. L 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 257 0.741 415 0.847 387 0.865 N87 257 0.741 401 0.796 377 0.873 Validity range: K1, K2: 0.10 mm < s < 3.00 mm K3, K4: 110 nH < A < 1100 nH L Please read Cautions and warnings and 2 5/17 Important notes at the end of this document.