• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.

3

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Ferrite Bead Inductor

Equivalent Circuit

Impedance - Frequency Characteristics (typical)

c Outline

o Chip Ferrite Beads are effective for frequencies ranging

from a few MHz to a few GHz. Chip Ferrite Beads are

widely used as a low noise countermeasure, as well as a

universal noise suppression component.

o Chip Ferrite Beads produce a micro inductance in a low

frequency range. At high frequencies, however, the

resistive component of the inductor produces the primary

impedance. When inserted in series in the noise

producing circuit, the resistive impedance of the inductor

prevents noise propagation.

R: Real Part (Resistive Portion)

X: Imaginary Part (Inductive Portion)

R(f)

BL01

BL02RN1

BL02RN2

BL03RN2

X

R

Z

160

140

120

100

80

60

40

20

0

0.5

1

2

5

10

20

50 100 200

500 1000

Frequency (MHz)

Outline of EMI Suppression Filters (EMIFIL

r) for DC Line