501 08/01
■ In accordance with IEC 60647
■ Compact E core with large winding window
■ Round center leg particularly suitable
for use of thick winding wires
■ EC cores are supplied as single units
Magnetic characteristics (per set)
Σl/A = 0,74 mm
–1
l
e
= 89,3 mm
A
e
= 121 mm
2
A
min
= 106 mm
2
V
e
= 10 800 mm
3
Approx. weight 52 g/set
Ungapped
Gapped
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”, page 382)
Validity range: K1, K2: 0,10 mm < s < 2,50 mm
K3, K4: 90 nH < A
L
< 850 nH
Material A
L
value
nH
µ
e
A
L1min
nH
P
V
W/set
Ordering code
N27 2700 + 30/– 20 % 1580 2130 < 1,80
(200 mT, 25 kHz, 100 °C)
B66339-G-X127
Material g
mm
A
L
value approx.
nH
µ
e
Ordering code
N27 0,25
± 0,02 470 275 B66339-G250-X127
0,50
± 0,05 281 165 B66339-G500-X127
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 168 – 0,742 300 – 0,847 279 – 0,865
B66339Core
EC 41/20/12
