B66344 Datasheet, PDF (1/2 Pages) EPCOS – E 55/28/25 Core

E 55/28/25
Core
I E cores are supplied as single units
Magnetic characteristics (per set)
Σl/A = 0,3 mm^–1
l_e = 124 mm
A_e = 420 mm²
A_min = 420 mm²
V_e = 52 100 mm³
Approx. weight 256 g
B66344
Ungapped
Mate- A_L value
rial nH
µ_e
A_L1min P_V
nH W/set
N27 6800 + 30/– 20 % 1600 5340 < 9,50
(200 mT, 25 kHz, 100 °C)
N87 7300 + 30/– 20 % 1740 5250 < 4,80
(100 mT, 100 kHz, 100 °C)
Ordering code
B66344-G-X127
B66344-G-X187
Gapped
Mate- g
rial mm
N27 2,50 ± 0,05
A_L value approx.
µ_e
nH
295
70
Ordering code
B66344-G2500-X127
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)
Material
N27
N87
Relationship between
air gap – A_L value
K1 (25 °C) K2 (25 °C)
596
– 0,769
596
– 0,769
Calculation of saturation current
K3 (25 °C)
992
950
K4 (25 °C)
– 0,847
– 0,796
K3 (100 °C) K4 (100 °C)
927
– 0,865
905
– 0,873
Validity range:
K1, K2: 0,15 mm < s < 3,50 mm
K3, K4: 220 nH < A_L < 2130 nH
431 08/01