05120513| Datasheet

Datasheet preview, take a look at Datasheets before downloading (Data Sheet is available on manufacturer site)

EFD 25/13/9 Core
I E core with flattened, lower center leg

B66421

for especially flat transformer design
I For DC/DC converters I EFD cores are supplied as single units

Magnetic characteristics (per set)

l/A le Ae A min Ve

= 0,98 mm 1 = 57 mm = 58 mm2 = 57 mm2 = 3 310 mm3

Approx. weight 16,6 g/set

Ungapped Material N87 AL value nH

A L1min P V nH W/set

Ordering code

2000 + 30/ 20 % 1560 1280

B66421-G-X187 < 1,80 (200 mT, 100 kHz, 100 C)

Gapped Material N87 AL value nH 160 10 % 250 10 % 315 10 %

ue
125 195 246

g approx. mm 0,55 0,30 0,22

Ordering code B66421-U160-K187 B66421-U250-K187 B66421-U315-K187

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) Material Relationship between air gap A L value K1 (25 C) N87 Validity range: 103 K2 (25 C) 0,734 Calculation of saturation current K3 (25 C) 154 K4 (25 C) 0,796 K3 (100 C) K4 (100 C) 138 0,873

K1, K2: 0,10 mm < s < 1,40 mm K3, K4: 50 nH < A L < 410 nH

512 08/01