E 40/16/12
Core
B66381
ꢀ Size based on US lam. size E cores
US designation E 21
ꢀ E cores are supplied as single units
Magnetic characteristics (per set)
–1
Σl/A = 0,52 mm
l
= 77 mm
= 149 mm
= 143 mm
e
2
2
A
A
V
e
min
e
3
= 11 500 mm
Approx. weight 58 g/set
Ungapped
Material
N27
A value
nH
µ
A
nH
P
V
W/set
Ordering code
L
e
L1min
3800 + 30/– 20 % 1560 3050 < 2,15
(200 mT, 25 kHz, 100 °C)
4600 + 30/– 20 % 1900 3150 < 1,12
(200 mT, 25 kHz, 100 °C)
B66381-G-X127
B66381-G-X172
N72
Gapped
Material
g
A value approx.
µ
Ordering code
L
e
mm
nH
N27
0,50 0,05
411
166
B66381-G500-X127
The A value in the table applies to a core set comprising one ungapped core (dimension g = 0) and
L
one gapped core (dimension g > 0).
Calculation factors (for formulas, see “E cores: general information”, page 382)
Material
Relationship between
air gap – A value
Calculation of saturation current
L
K1 (25 °C) K2 (25 °C) K3 (25 °C) K4 (25 °C) K3 (100 °C) K4 (100 °C)
239 – 0,782 378 – 0,847 351 – 0,865
N27
Validity range:
K1, K2: 0,10 mm < s < 2,50 mm
K3, K4: 130 nH < A < 1200 nH
L
425 08/01