2 5/17
Please read Cautions and warnings and
Important notes at the end of this document.
■ Delivery mode: single units
Magnetic characteristics (per set)
Σl/A= 0.68 mm
–1
l
e
= 81 mm
A
e
= 120 mm
2
A
min
= 112 mm
2
V
e
= 9720 mm
3
Approx. weight 50 g/set
Ungapped
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).
Other A
L
values/air gaps and materials available on request – see Processing remarks on page 4.
Calculation factors (for formulas, see “E cores: general information”)
Validity range: K1, K2: 0.10 mm < s < 2.50 mm
K3, K4: 100 nH < A
L
< 930 nH
Material value
nH
μ
e
P
V
W/set
Ordering code
N27 2900 +30/–20% 1550 < 1.85 (200 mT, 25 kHz, 100 °C) B66389G0000X127
N87 3100 +30/–20% 1680 < 5.00 (200 mT, 100 kHz, 100 °C) B66389G0000X187
Material g
mm
A
L
value
approx.
nH
μ
e
Ordering code
N27 0.50 ±0.05 300 160 B66389G0500X127
1.00 ±0.05 183 96 B66389G1000X127
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)
N27 182 –0.749 302 –0.847 280 –0.865
N87 182 –0.749 295 –0.796 273 –0.873
B66389Core
E 36/18/11
