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).
Materials - Manganese Zinc Materials - Nickel Zinc RM Cores - Regular Table
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 |
|
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 |
|
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 |
|
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 |
|
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 |
|
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 |
|
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 |
|
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 |
|
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 |
|
29-900 |
- |
- |
- |
- |
- |
- |
||||||
|
28-700 |
- |
- |
- |
- |
||||||||
|
29-730- |
- |
- |
||||||||||
|
29-7600- |
- |
- |
- |
|||||||||
|
29-790- |
- |
|||||||||||
|
29-830- |
||||||||||||
|
29-930- |
- |
- |
- |
- |
||||||||
|
29-880- |
- |
- |
- |
- |
- |
- |
||||||
|
29-950- |
- |
- |
- |
- |
- |
- |
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
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
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
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
