3

09/06

Please read Cautions and warnings and

Important notes at the end of this document.

Calculation factors (for formulas, see “E cores: general information”)

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

Material

Relationship between

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

90

–0.731

139

–0.847

129

–0.865

N87

90

–0.731

139

–0.796

125

–0.873

B66317

Core

E 25/13/7 (EF 25)