Core Shape

Dimensions, mm

without coating

coated

OD

ID

h

OD,max

ID,min

h,max

SK- type

7
10
10
12
13
17
20

4.0
6.0
6.0
5.0
7.0
10.0
12.0

3.0
3.0
4.5
5.5
5.0
6.5
6.5

7.8
10.8
10.8
12.8
13.8
17.8
20.8

3.50
5.50
5.50
4.50
6.56
9.56
11.63

4.1
4.1
5.6
6.6
6.1
7.6
7.6

SP - type

15
15
19
19
24
24
27
27
36
36
44
44
52
52

7
7
11
11
13
13
15
15
25
25
28
28
36
36

4.8
6.7
4.8
6.7
5.2
7.0
5.2
6.0
7.5
9.7
7.2
10.3
10.0
14.0

15.8
15.8
19.8
19.8
24.8
24.8
27.8
27.8
37.0
37.0
45.0
45.0
53.0
53.0

6.56
6.56
10.53
10.53
12.63
12.63
14.52
14.52
24.52
24.52
27.52
27.52
35.52
35.52

5.9
7.8
5.9
7.8
6.3
8.1
6.3
7.1
8.8
11.0
8.5
11.6
11.3
15.3

m_i

Initial permeability

Bm

Max. magnetic flux density

fc

Critical frequency

Br

Residual flux density

f

Operational frequency

Hc

Coercive force

tgd/m

Loss factor

A_L

Induction factor

Hm

External magnetic field

Psp

Specific bulk magnetic losses

d_h

Hysteresis loss coefficient

d

Density

d_f

Resudial loss coefficient

Tkm

Temperature coefficient of initial permeability