On-Board Type (DC) EMI Suppression Filters (EMIFILr)
On-Board Type (DC) EMI Suppression Filters ("EMIFIL")
On-Board Type (DC) EMI Suppression Filters ("EMIFIL")
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• This PDF catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.<br />
C31E.pdf<br />
08.9.1<br />
Outline of <strong>EMI</strong> <strong>Suppression</strong> <strong>Filters</strong> (<strong>EMI</strong>FILr) for <strong>DC</strong> Line<br />
oChip Ferrite Bead<br />
oFerrite Bead Inductor<br />
Chip Ferrite Bead .............p.21–91<br />
Ferrite Bead Inductor<br />
..........p.146–148<br />
BLM02<br />
BLM03<br />
BLM15<br />
BLM18<br />
BLA2A<br />
BL01<br />
BL02RN1<br />
BLM21<br />
BLM31<br />
BLM41<br />
BLA31<br />
BL02RN2<br />
BL03RN2<br />
" Chip Ferrite Beads are effective for frequencies ranging<br />
from a few MHz to a few GHz. Chip Ferrite Beads are<br />
widely used as a low noise countermeasure, as well as a<br />
universal noise suppression component.<br />
" Chip Ferrite Beads produce a micro inductance in the low<br />
frequency range. At high frequencies, however, the<br />
resistive component of the inductor produces the primary<br />
impedance. When inserted in series in the noise<br />
producing circuit, the resistive impedance of the inductor<br />
prevents noise propagation.<br />
Equivalent Circuit<br />
R(f)<br />
Impedance - Frequency Characteristics (typical)<br />
1000<br />
800<br />
Impedance (Ω)<br />
600<br />
400<br />
Z<br />
R<br />
200<br />
X<br />
0<br />
1 10 100 1000<br />
Frequency (MHz)<br />
R: Real Part (Resistive Portion) X: Imaginary Part (Inductive Portion)<br />
7
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