On-Board Type (DC) EMI Suppression Filters (EMIFILr)

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■ Impedance - Frequency Characteristics
BLM41PG181SN1
BLM41PG471SN1
400
600
C31E.pdf
08.9.1
300
450
Z
1
Impedance (Ω)
200
100
Z
R
Impedance (Ω)
300
150
R
X
X
0
1 10 100 1000
0
1 10 100 1000
Frequency (MHz)
Frequency (MHz)
1200
BLM41PG102SN1
Impedance (Ω)
900
600
300
Z
R
X
0
1 10 100 1000
Frequency (MHz)
BLM18K Series (0603 Size)
■ Features
The chip ferrite beads BLM series is designed to
function nearly as a resistor at noise frequencies,
which greatly reduces the possibility of resonance and
leaves signal wave forms undistorted.
BLM series is effective in circuits without stable
ground lines because BLM series does not need a
connection to ground.
The nickel barrier structure of the external
electrodes provides excellent solder heat resistance.
BLM_K series can be used in high current circuits
due to its low DC resistance. It can match power lines
to a maximum of 6A DC.
■ Equivalent Circuit
(Resistance element becomes dominant
at high frequencies.)
0.4±0.2
0.8±0.15
1.6±0.15
0.8±0.15
BLM18KG Series
(in mm)
64