B66423G0000X187 Datasheet, PDF (2/5 Pages) EPCOS – Ferrites and accessories

EFD 30/15/9
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)
Σl/A = 0.99 mm^–1
l_e = 68 mm
A_e = 69 mm²
A_min = 69 mm²
V_e = 4690 mm³
Approx. weight 24 g/set
B66423
Ungapped
Material
N87
N97
A_L value
nH
2050 +30/–20%
2150 +30/–20%
µ_e
1610
1690
P_V
W/set
< 2.6 (200 mT, 100 kHz, 100 °C)
< 2.2 (200 mT, 100 kHz, 100 °C)
Ordering code
B66423G0000X187
B66423G0000X197
Gapped
Material A_L value
µ_e
nH
N87
160 ±10%
125
250 ±10%
196
315 ±10%
246
g
approx. mm
0.71
0.38
0.27
Ordering code
B66423U0160K187
B66423U0250K187
B66423U0315K187
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)
125
– 0.712
Calculation of saturation current
K3 (25 °C) K4 (25 °C) K3 (100 °C) K4 (100 °C)
176
– 0.796
161
– 0.873
Validity range:
K1, K2: 0.10 mm < s < 2.00 mm
K3, K4: 70 nH < A_L < 630 nH
Please read Cautions and warnings and
Important notes at the end of this document.
2 09/06