514 08/01 e core with flattened, lower center leg for especially flat transformer design for dc/dc converters efd cores are supplied as single units magnetic characteristics (per set) l/a = 0,99 mm 1 l e = 68 mm a e = 69 mm 2 a min = 69 mm 2 v e = 4 690 mm 3 approx. weight 24 g/set ungapped gapped the a l value in the table applies to a core set comprising one ungapped core (dimension g = 0) and one gapped core (dimension g > 0). calculation factors (for formulas, see ? e cores: general information ? , page 382) validity range: k1 , k2 : 0,10 mm < s < 2,00 mm k3 , k4 : 70 nh < a l < 630 nh material a l value nh e a l1min nh p v w/set ordering code n87 2050 + 30/ 20 % 1610 1280 < 2,60 (200 mt, 100 khz, 100 c) b66423-g-x187 material a l value nh e g approx. mm ordering code n87 160 10 % 125 0,71 b66423-u160-k187 250 10 % 196 0,38 b66423-u250-k187 315 10 % 246 0,27 b66423-u315-k187 material relationship between air gap a l value calculation of saturation current k1 (25 c) k2 (25 c) k3 (25 c) k4 (25 c) k3 (100 c) k4 (100 c) n87 125 0,712 176 0,796 161 0,873 b66423 core efd 30/15/9
515 08/01 coil former material: gfr thermosetting plastic; ul 94 v-0, insulation class to iec 60085: b66424-b: f max. operating temperature 155 c; color code green b66424-w: h max. operating temperature 180 c; color code black 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 ? , page 157 squared pins yoke material: stainless spring steel (0,45 mm) coil former yoke coil former ordering code sections a n mm 2 l n mm a r value ? pins 1 52,3 56,7 37,3 12 b66424-b1012-d1 B66424-W1012-D1 yoke (ordering code per piece, 2 are required) b66424-b2000 fek0272-r 8,3 max. 1,2 1,2 30,6 6,65 28,5 min. ansicht a a fek0212-i 123456 300,2 7 8 9 10 11 12 310,2 5,2 14,9+0,25 1,7 13 max. 3,50,2 20,1 min. 0,6 1,3+0,1 27,5 16 7 12 5 x 5 = 25 montagelochung markierung f ? r stift 1 5 cusn6, verzinnt duroplast 0,2 16,4 _ 21,55 0,15 _ 12 _ 0,2 21,7 _ 0,2 6,6 0,2 1,6 _ mounting holes marking of pin 1 view a cusn6, tinned thermosetting plastic b66424 accessories efd 30/15/9
1 herausgegeben von epcos ag marketing kommunikation, postfach 80 17 09, 81617 mnchen, deutschland ? epcos ag 2000. alle rechte vorbehalten. vervielf ? ltigung, ver ? ffentlichung, verbreitung und verwertung dieser brosch re und ihres inhalts ohne ausdr ckliche genehmigung der epcos ag nicht gestattet. mit den angaben in dieser brosch re werden die bauelemente spezifiziert, keine eigenschaften zugesichert. bestellungen unterliegen den vom zvei empfohlenen allgemeinen lieferbedingungen f r erzeugnisse und leistungen der elektroindustrie, soweit nichts anderes vereinbart wird. diese brosch re ersetzt die vorige ausgabe. fragen ber technik, preise und lieferm ? glichkeiten richten sie bitte an den ihnen n ? chstgele- genen vertrieb der epcos ag oder an unsere vertriebsgesellschaften im ausland. bauelemente k ? nnen aufgrund technischer erfordernisse gefahrstoffe enthalten. ausk nfte dar ber bitten wir unter angabe des betreffenden typs ebenfalls ber die zust ? ndige vertriebsge- sellschaft einzuholen. published by epcos ag marketing communications, p.o. box 80 17 09, 81617 munich, germany ? epcos ag 2000. all rights reserved. reproduction, publication and dissemination of this bro- chure and the information contained therein without epcos ? prior express consent is prohibited. the information contained in this brochure describes the type of component and shall not be con- sidered as guaranteed characteristics. purchase orders are subject to the general conditions for the supply of products and services of the electrical and electronics industry recommended by the zvei (german electrical and electronic manufacturers ? association), unless otherwise agreed. this brochure replaces the previous edition. for questions on technology, prices and delivery please contact the sales offices of epcos ag or the international representatives. due to technical requirements components may contain dangerous substances. for information on the type in question please also contact one of our sales offices.
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