Rm Cores – Regular

RM (Rectangular modulus) cores arose due to the demand for coil formers with integrated pins that allow for efficient winding and high PCB packing densities. Clamps engaging in recesses in the core base hold the cores in place, meaning glue is not normally required in this process. All the cores adhere to specifications laid down in IEC 62317-4 and in DIN 41980.

RM cores are designed for two main applications:

  • Highly stable, extremely low loss filters inductors and other resonance determining inductors (F58, P11).
  • Low distortion broadband transmission at low signal modulation (F39, F10, F9).

RM cores can also be supplied without the centre hole. These have a higher A L value and cross sectional area and are used for power transformer applications (F47, F44, and F5A).

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Dimensional details

 

Part

No.

Core

A

mm

B

mm

C

mm

D

mm

E

mm

F

mm

G

mm

H

mm

Effective Parameters

Approx. Weight/

Set

gms/ set

                   

Σ l/A

mm-1

le

mm

Ae

mm2

Ve

mm3

29-950-

R6

17.6-0.6

12.4+0.4

6.4-0.2

3+0.1

8+0.4

12.5-0.2

10.34±0.25

14.7-0.5

0.8

25.6

32

820

5.1

AL Values with Tolerance Code

 

Part

No.

F58

P11

F5

F5A

F5C

F44

F47

F9

F9C

F10

F39

F44A

29-950-

732R

2300R

-

-

-

-

-

4300R

4900R

6000R

8600Y

-

Dimensional details

 

Part

No.

Core

A

mm

B

mm

C

mm

D

mm

E

mm

F

mm

G

mm

H

mm

Effective Parameters

Approx. Weight/

Set

gms/ set

                   

Σ l/A

mm-1

le

mm

Ae

mm2

Ve

mm3

29-830-

RM10

28.5-1.3

21.2+0.9

10.9-0.4

5.4+0.2

12.4+0.6

18.7-0.2

16.2±0.25

24.7-1.1

0.5

42

83

3470

20

AL Values with Tolerance Code

 

Part

No.

F58

P11

F5

F5A

F5C

F44

F47

F9

F9C

F10

F39

F44A

29-830-

1600R

3960R

4000R

4490R

3300+60%

3800R

3650R

7600R

8060R

11000R

16000Y

4200R

Dimensional details

 

Part

No.

Core

A

mm

B

mm

C

mm

D

mm

E

mm

F

mm

G

mm

H

mm

Effective Parameters

Approx. Weight/

Set

gms/ set

                   

Σ l/A

mm-1

le

mm

Ae

mm2

Ve

mm3

29-930-

RM12

37.6-1.5

24.9+1.1

12.8-0.4

5.4+0.2

16.8+0.6

24.6-0.2

21.6±0.25

29.8-1.2

0.39

56.6

146

8340

44

AL Values with Tolerance Code

 

Part

No.

F58

P11

F5

F5A

F5C

F44

F47

F9

F9C

F10

F39

F44A

29-930-

-

-

4400R

5800R

6000R

5000R

4750R

8400R

-

12800R

-

5300R

Dimensional details

 

Part

No.

Core

A

mm

B

mm

C

mm

D

mm

E

mm

F

mm

G

mm

H

mm

Effective Parameters

Approx. Weight/

Set

gms/ set

                   

Σ l/A

mm-1

le

mm

Ae

mm2

Ve

mm3

29-880-

RM14

42.2-1.2

29+1

15-0.5

5.4+0.2

20.8+0.6

30.2-0.2

27±0.25

34.8-1.3

0.35

70

200

14000

72

AL Values with Tolerance Code

 

Part

No.

F58

P11

F5

F5A

F5C

F44

F47

F9

F9C

F10

F39

F44A

29-880-

-

-

-

6600R

6800R

6000R

5400R

9500R

-

-

-

6000R

Dimensional details

 

Part

No.

Core

A

mm

B

mm

C

mm

D

mm

E

mm

F

mm

G

mm

H

mm

Effective Parameters

Approx. Weight/

Set

gms/ set

                   

Σ l/A

mm-1

le

mm

Ae

mm2

Ve

mm3

29-900

RM4

11-0.4

8+0.3

3.9-0.2

2+0.1

7+0.4

10.5-0.2

9±0.25

9.8-0.4

1.9

21

11

232

1.45

AL Values with Tolerance Code

 

Part

No.

F58

P11

F5

F5A

F5C

F44

F47

F9

F9C

F10

F39

F44A

29-900

-

900R

-

-

-

800R

-

1700R

-

2800R

3700Y

1100R

Dimensional details

 

Part

No.

Core

A

mm

B

mm

C

mm

D

mm

E

mm

F

mm

G

mm

H

mm

Effective Parameters

Approx. Weight/

Set

gms/ set

                   

Σ l/A

mm-1

le

mm

Ae

mm2

Ve

mm3

28-700

RM5

14.6-0.6

10.2+0.4

4.9-0.2

2+0.1

6.3+0.4

10.5-0.2

9±0.25

12.3-0.5

1

20.8

20.8

430

2.9

AL Values with Tolerance Code

 

Part

No.

F58

P11

F5

F5A

F5C

F44

F47

F9

F9C

F10

F39

F44A

28-700

-

1800R

-

-

2600R

1570R

-

3170R

6000Y

5200R

6700Y

1800R

Dimensional details

 

Part

No.

Core

A

mm

B

mm

C

mm

D

mm

E

mm

F

mm

G

mm

H

mm

Effective Parameters

Approx. Weight/

Set

gms/ set

                   

Σ l/A

mm-1

le

mm

Ae

mm2

Ve

mm3

29-730-

RM6

17.9-0.6

12.4+0.5

6.4-0.2

3+0.1

8+0.4

12.5-0.2

 

10.34±0.25

 

14.7-0.6

0.86

26.90

31.3

840

4.9

AL Values with Tolerance Code

 

Part

No.

F58

P11

F5

F5A

F5C

F44

F47

F9

F9C

F10

F39

F44A

29-730-

890R

2000R

2250R

-

3100R

2200R

-

4625R

4270R

6200R

8600Y

2200R

Dimensional details

 

Part

No.

Core

A

mm

B

mm

C

mm

D

mm

E

mm

F

mm

G

mm

H

mm

Effective Parameters

Approx. Weight/

Set

gms/ set

                   

Σ l/A

mm-1

le

mm

Ae

mm2

Ve

mm3

29-7600-

RM7

20.3-0.8

14.75+0.65

7.25-0.3

3+0.1

8.5+0.4

13.5-0.2

11.3±0.25

17.2-0.7

0.74

29.8

40

1200

6.5

AL Values with Tolerance Code

 

Part

No.

F58

P11

F5

F5A

F5C

F44

F47

F9

F9C

F10

F39

F44A

29-7600-

-

2800R

-

2850R

3400R

2370R

-

4690R

5040R

7000R

10000Y

2700R

Dimensional details

 

Part

No.

Core

A

mm

B

mm

C

mm

D

mm

E

mm

F

mm

G

mm

H

mm

Effective Parameters

Approx. Weight/

Set

gms/ set

                   

Σ l/A

mm-1

le

mm

Ae

mm2

Ve

mm3

29-790-

RM8

23.2-0.9

17+0.6

8.55-0.3

4.4+0.2

10.8+0.4

16.5-0.2

14.3±0.25

19.7-0.8

0.67

35.50

52

1850

10.3

AL Values with Tolerance Code

 

Part

No.

F58

P11

F5

F5A

F5C

F44

F47

F9

F9C

F10

F39

F44A

29-790-

1170R

2500R

3000R

4000R

4300R

2906R

-

5700R

5670R

8375R

12500Y

3300R

17.6-0.6
12.4+0.4
6.4-0.2
3+0.1
8+0.4
12.5-0.2
10.34±0.25
14.7-0.5
5.1
28.5-1.3
21.2+0.9
10.9-0.4
5.4+0.2
12.4+0.6
18.7-0.2
16.2±0.25
24.7-1.1
20
37.6-1.5
24.9+1.1
12.8-0.4
5.4+0.2
16.8+0.6
24.6-0.2
21.6±0.25
29.8-1.2
44
42.2-1.2
29+1
15-0.5
5.4+0.2
20.8+0.6
30.2-0.2
27±0.25
34.8-1.3
72
11-0.4
8+0.3
3.9-0.2
2+0.1
7+0.4
10.5-0.2
9±0.25
9.8-0.4
1.45
14.6-0.6
10.2+0.4
4.9-0.2
2+0.1
6.3+0.4
10.5-0.2
9±0.25
12.3-0.5
2.9
17.9-0.6
12.4+0.5
6.4-0.2
3+0.1
8+0.4
12.5-0.2
10.34±0.25
14.7-0.6
4.9
20.3-0.8
14.75+0.65
7.25-0.3
3+0.1
8.5+0.4
13.5-0.2
11.3±0.25
17.2-0.7
6.5
23.2-0.9
17+0.6
8.55-0.3
4.4+0.2
10.8+0.4
16.5-0.2
14.3±0.25
19.7-0.8
10.3