Common mode ferrite chokes
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Common mode chokes are usually based on high permeability ferrite toroids with at least two symmetrical windings. The operating current flows through them in such a way that the magnetics fields cancel each other out. The operating current is only affected by the low stray inductance of the windings. If the currents in the windigs are different, because of asymmetric interference, a high inductance works on the differential current.
These chokes are used mainly for RFI suppression of appliances and machines. Moreover these highly symmetrical chokes can be used as transformers as well as for potential separation.
Our standard offer consists of double chokes PMEC 100 to 104 series in vertical or horizontal design.
On request we can supply chokes with three or more windings too.
Datasheets 
Prices Crossreference table of common mode chokes |
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Design, dimensions and technical data
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| Series |
a |
b |
c |
d |
e |
f |
Pins |
3D model |
101/V
 |
18 |
13 |
20 |
5 |
10 |
5 |
0,6 x 0,6 |
  |
102/V
|
23 |
15,5 |
25 |
10 |
12,5 |
5 |
0,6 x 0,6 |
|
103/V
|
26 |
18 |
30 |
12,5 |
15 |
5 |
0,6 x 0,6 |
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104/V
|
32 |
21 |
35 |
12,5 |
17,5 |
7,5 |
0,8 x 0,8 |
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104a/V
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32 |
18,5 |
35 |
12,5 |
15 |
7,5 |
0,8 x 0,8 |
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100/H
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10,5 |
14 |
10 |
10 |
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0,6 x 0,6 |
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101/H
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12,5 |
17,5 |
15 |
10 |
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0,6 x 0,6 |
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102/H
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14 |
22,5 |
20 |
12,5 |
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0,6 x 0,6 |
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103/H
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16,5 |
28 |
25 |
15 |
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0,6 x 0,6 |
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104/H
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19,5 |
32,5 |
30 |
20 |
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0,8 x 0,8 |
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| Climatic category |
40/125/21 |
| Nominal voltage |
250 V, 50 Hz |
| Testing voltage (winding - winding) |
1500 V, 50 Hz, 2 sec. |
| Inductance tolerance 1) |
- 30 %, + 40 % |
| Overtemperature of the windings |
< 55 °C |
| Maximum admissible temperature of the windings |
115 °C |
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1) Measured at 10 kHz, 50 mV and 25 °C.
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The nominal current is applicable up to ambient temperature of 60 °C. Above this temperature descends the acceptable current linear to zero at 125 °C.
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All measurements comply with the requirements of EN 60938-1 (VDE 0565 part 2).
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Insertion loss of common mode chokes series PMEC 100 to 104
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