E 25/13/7 (EF 25)
Core
B66317
Calculation factors (for formulas, see “E cores: general information”, page 382)
Material
N27
N87
Relationship between
air gap – AL value
K1 (25 °C) K2 (25 °C)
90
– 0,731
90
– 0,731
Calculation of saturation current
K3 (25 °C)
139
139
K4 (25 °C)
– 0,847
– 0,796
K3 (100 °C) K4 (100 °C)
129
– 0,865
125
– 0,873
Validity range:
K1, K2: 0,10 mm < s < 2,00 mm
K3, K4: 60 nH < AL < 570 nH
411 08/01