B66413G0000X149_13 Datasheet, PDF (2/9 Pages) EPCOS – Ferrites and accessories

EFD 15/8/5
Core
■ E core with flattened, lower center leg 
for especially flat transformer design
■ For DC/DC converters
■ Delivery mode: single units
Magnetic characteristics (per set)
l/A = 2.27 mm^–1
l_e = 34 mm
A_e = 15 mm^2
A_min = 12.2 mm^2
V_e = 510 mm³
Approx. weight 2.8 g/set
B66413
Ungapped
Material
N49
N87
N97
A_L value
nH
600 +30/–20%
780 +30/–20%
820 +30/–20%
_e
1080
1400
1480
P_V
W/set
Ordering code
< 0.11 ( 50 mT, 500 kHz, 100 °C) B66413G0000X149
< 0.28 (200 mT, 100 kHz, 100 °C) B66413G0000X187
< 0.23 (200 mT, 100 kHz, 100 °C) B66413G0000X197
Gapped
Material A_L value
_e
nH
N87
10010%
180
160 15%
288
g
approx. mm
0.17
0.08
Ordering code
B66413U0100K187
B66413U0160L187
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” )
Material
N87
Relationship between
air gap – A_L value
K1 (25 °C) K2 (25 °C)
29.7
– 0.676
Calculation of saturation current
K3 (25 °C) K4 (25 °C) K3 (100 °C) K4 (100 °C)
44.2
– 0.796
33.2
– 0.873
Validity range:
K1, K2: 0.10 mm < s < 1.00 mm
K3, K4: 30 nH < A_L < 280 nH
Please read Cautions and warnings and
Important notes at the end of this document.
2 06/13