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Ferrit coils with baked varnish windings<br />
Ferrite coils, of which we have only a limited range at the moment, supplement the<br />
programme for applications in parallel circuits, series resonant circuits, etc. where low<br />
internal resistance is less important than small dimensions and low costs.<br />
The windings of baked varnish coils are made using a special wire. After the coil has been<br />
wound it is heated up causing an additional layer of varnish on the wire to melt, bonding the<br />
individual windings firmly together. The effect is similar to that achieved with vacuum<br />
impregnation, but this process is cheaper for small coils. Baked varnish coils are available<br />
with winding diameters from 0.71mm – 1.40mm. All series are identified with a “b” prefix.<br />
e2<br />
e1<br />
d<br />
l<br />
d1<br />
Technical Specifications:<br />
Tolerance: Max 3%, typically 1.5%<br />
Electrolyte copper 99.99 % pure<br />
Coil forms: PA, glass fibre reinforced<br />
coil form d l d1 e1 e2<br />
mm mm mm mm mm<br />
30/17 30 20 5.2 3 9<br />
40/17 40 20 5.2 5 12<br />
Ferrite coils with backed varnish wire 0.71 mm BF71<br />
mH <strong>OHM</strong> KÖRPER €/Stk<br />
1,00 0,36 30/17.5<br />
1,49 1,44 30/17.5<br />
1,50 0,61 30/17.5<br />
1,80 0,79 40/17.5<br />
2,20 0,91 40/17.5<br />
2,70 1,01 40/17.5<br />
3,00 1,06 40/17.5<br />
3,30 1,12 40/17.5<br />
3,90 1,22 40/17.5<br />
Ferrite coils with backed varnish wire 1.00 mm BF100<br />
mH <strong>OHM</strong> KÖRPER €/Stk<br />
0,47 0,20 30/17.5<br />
0,56 0,23 40/17.5<br />
0,68 0,26 40/17.5<br />
0,82 0,30 40/17.5<br />
1,00 0,34 40/17.5<br />
1,20 0,40 40/17.5<br />
20