554 siemens matsushita components l e core with flattened, lower center leg for especially flat transformer design l for dc/dc converters l efd cores are supplied as single units magnetic characteristics (per set) s l/a = 0,98 mm C1 l e = 57 mm a e = 58 mm 2 a min = 57 mm 2 v e = 3 310 mm 3 approx. weight 16,6 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 (see page 423 for formulas) validity range: k1 , k2 : 0,10 mm < s < 1,40 mm k3 , k4 : 50 nh < a l < 410 nh material a l value nh m e a l1min nh p v w/set ordering code n67 2000 + 30/C 20 % 1560 1280 2,10 (200 mt, 100 khz, 100 ?c) b66421-g-x167 n87 2000 + 30/C 20 % 1560 1280 1,80 (200 mt, 100 khz, 100 ?c) b66421-g-x187 material a l value nh m e g approx. mm ordering code ** = 67 (n67) = 87 (n87) n67, 160 10 % 125 0,55 b66421-u160-k1** n87 250 10 % 195 0,30 b66421-u250-k1** 315 10 % 246 0,22 b66421-u315-k1** material relationship between air gap C 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) n67 103 C 0,734 150 C 0,820 142 C 0,881 n87 103 C 0,734 154 C 0,796 138 C 0,873 efd 25/13/9 core b66421
siemens matsushita components 555 coil former material: gfr thermosetting plastic (ul 94 v-0, insulation class to iec 60085: f max.operating temperature 155 ?c), color code green 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 page 156 squared pins yoke l material: stainless spring steel (0,4 mm) coil former yoke coil former ordering code sections a n mm 2 l n mm a r value mw pins 1 40,7 50 42,3 10 b66422-b1010-d1 yoke (ordering code per piece, 2 are required) b66422-b2000 fek0330-m 12345 109876 11,7+0,2 12,8 max. 1,7 0,6 16,4 min. 22,5 5 1 10 6 montagelochung 5 cusn6, verzinnt duroplast 250,2 _ 13,1 0,15 _ 26 0,3 ? 1,3+0,1 4 x 5 = 20 18 0,25 _ 3,50,2 5,5+0,2 markierung fr stift 1 12 0,2 _ 0,1 1,6 _ 0,2 18 _ 0,1 6,9 _ mounting holes marking of pin 1 view a cusn6, tinned thermosetting plastic efd 25/13/9 accessories b66422
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