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Please read Cautions and warnings and
Important notes at the end of this document.
■ 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= 2.27 mm
–1
l
e
= 34 mm
A
e
= 15 mm
2
A
min
= 12.2 mm
2
V
e
= 510 mm
3
Approx. weight 2.8 g/set
Ungapped
Other A
L
values/air gaps and materials available on request – see Processing remarks on page 5.
Gapped (A
L
values/air gaps examples)
The A
L
value in the table applies to a core set comprising one ungapped core (dimension g = 0 mm)
and one gapped core (dimension g > 0 mm).
Calculation factors (for formulas, see “E cores: general information”)
Validity range: K1, K2: 0.10 mm < s < 1.00 mm
K3, K4: 30 nH < A
L
< 280 nH
Material A
L
value
nH
μ
e
P
V
W/set
Ordering code
N49 600 +30/–20% 1080 < 0.11 ( 50 mT, 500 kHz, 100 °C) B66413G0000X149
N87 780 +30/–20% 1400 < 0.28 (200 mT, 100 kHz, 100 °C) B66413G0000X187
N97 820 +30/–20% 1480 < 0.23 (200 mT, 100 kHz, 100 °C) B66413G0000X197
Material A
L
value
nH
μ
e
g
approx.
mm
Ordering code
** = 87 (N87)
= 97 (N97)
N87, 50 ±5% 90 0.46 B66413U0050J1**
N97 100 ±10% 180 0.17 B66413U0100K1**
125 ±10% 225 0.12 B66413U0125K1**
160 ±15% 288 0.08 B66413U0160L1**
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 29.7 –0.676 44.2 –0.796 33.2 –0.873
B66413Core
EFD 15/8/5
