| CONSTRUCTION
Single conductors, wound in a single layer, to give minimum self-capacitance. Mounted onto an industry-standard pinned base for vertical mounting onto the pcb. Covering all of the industry-standard current ratings, with extra types added at 1.5A, 2.5A, 5A, 7A, 9A, 10A, 11A, 12A & 13A.
Now with new versions added on a larger sized core to give higher inductance options.
SUMMARY
Series-mode (differential) noise is generated by interference currents flowing from line to neutral. A particular example is the fast current rise in phase-angle control circuits, where harmonics extend well into the 10kHz to 30MHz frequency range covered by UK and International EMC legislation. Series-mode noise has also to be considered on the input to switched-mode power supplies (SMPSUs). As series-mode noise appears on both line and neutral simultaneously, phase-cancelling techniques cannot be used, and the magnetic core used has to maintain inductance with the full phase currently flowing. This is a very severe requirement in equipment with high peak currents, such as the capacitor charging currents on SMPSU inputs, so soft-saturation powder cores are preferred because of their high overload capabilities. All chokes in this range are based on a selected grade of iron powder toroids, for low flux-leakage and a hold-up of inductance at high line currents.
| |
Current |
Inductance |
Resistance |
Part No. |
Dimensions |
Pinout Type |
| |
lc amps |
L mh |
DCR ohms |
|
height h,mm. |
width w,mm. |
depth d,mm. |
Pins |
Mounting |
| |
1 |
1.1 |
1.3 |
VSM10 |
35 |
32 |
17 |
4 |
base B8 |
 |
| Extra |
1.5 |
0.75 |
0.6 |
VSM15 |
35 |
32 |
17 |
4 |
base B8 |
|
| |
2 |
0.51 |
0.33 |
VSM20 |
35 |
32 |
17 |
4 |
base B8 |
|
| Extra |
2.5 |
0.37 |
0.21 |
VSM25 |
35 |
32 |
17 |
4 |
base B8 |
|
| |
3 |
0.27 |
0.13 |
VSM30 |
35 |
32 |
17 |
4 |
base B8 |
|
| |
4 |
0.22 |
0.09 |
VSM40 |
35 |
32 |
17 |
4 |
base B8 |
|
| Extra |
5 |
0.16 |
0.055 |
VSM50 |
35 |
32 |
17 |
4 |
base B8 |
| New! |
5 |
0.28 |
0.06 |
VSM51 |
35 |
32 |
17 |
4 |
base B8 |
|
| |
6 |
0.12 |
0.038 |
VSM60 |
35 |
32 |
17 |
4 |
base B8 |
|
| Extra |
7 |
0.1 |
0.028 |
VSM70 |
35 |
32 |
17 |
4 |
base B8 |
| New! |
7 |
0.15 |
0.043 |
VSM72 |
42 |
38 |
17 |
4 |
base B8 |
|
| |
8 |
0.083 |
0.025 |
VSM80 |
35 |
32 |
17 |
4 |
base B8 |
| New! |
8 |
0.11 |
0.029 |
VSM82 |
42 |
38 |
17 |
4 |
base B8 |
|
| Extra |
9 |
0.061 |
0.02 |
VSM90 |
35 |
32 |
17 |
4 |
base B8 |
| New! |
9 |
0.1 |
0.027 |
VSM92 |
42 |
38 |
17 |
4 |
base B8 |
|
| New! |
10 |
0.039 |
0.017 |
VSM100 |
35 |
32 |
17 |
4 |
base B8 |
| New! |
10 |
0.06 |
0.021 |
VSM102 |
42 |
38 |
17 |
4 |
base B8 |
|
| New! |
11 |
0.028 |
0.014 |
VSM110 |
35 |
32 |
17 |
4 |
base B8 |
| New! |
11 |
0.044 |
0.019 |
VSM112 |
42 |
38 |
17 |
4 |
base B8 |
|
| New! |
12 |
0.019 |
0.012 |
VSM120 |
35 |
32 |
17 |
4 |
base B8 |
| New! |
12 |
0.033 |
0.016 |
VSM122 |
42 |
38 |
17 |
4 |
base B8 |
|
| New! |
13 |
0.014 |
0.01 |
VSM130 |
35 |
32 |
17 |
4 |
base B8 |
| New! |
13 |
0.021 |
0.013 |
VSM132 |
42 |
38 |
17 |
4 |
base B8 |
Series mode chokes EMC chokes |
