We offer ferrite beads with impedance ratings from 0.15ohm to 15kohm, and DC current ratings from 50mA to 20A

What is a Ferrite Bead?

Ferrite beads or chip inductor beads are passive electronic components that can suppress high frequency signals on a power supply line. They are normally placed around a power/ground line pair that is incoming to a particular device, such as the power cord for your laptop. These beads work according to Faraday’s Law: the magnetic core around a conductor induces a back EMF in the presence of a high frequency signal, essentially attenuating the ferrite frequency response.

Ferrites are magnetic materials, and placing this material in a ferrite clamp around the power supply/ground line provides a source of inductive impedance for signals passing through the line.

Ferrite bead model

A ferrite bead can be modelled as capacitors and inductors, plus a resistor in parallel with this RLC network wired with a series resistor. The series resistor quantifies the device’s resistance to DC currents. The inductor in this model represents a ferrite beads primary function of attenuating high-frequency signals, i.e., providing inductive impedance through Faraday’s Law. The parallel resistor in this model accounts for losses in eddy currents that are induced within the ferrite bead at high frequencies. Finally, the capacitor in this model accounts for the component’s natural parasitic capacitance.

Fair-Rite, for example, offers a broad selection of cost-effective multi-layer chip inductor beads to suppress conducted EMI signals. Chip inductor beads can be used in an array of devices such as cellular phones, computers, laptops, pagers, etc. The small package sizes accommodate automated placements and allow for a dense packaging of circuit boards.

Chip Inductor Beads are available in standard, high and GHz signal speeds.

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Ferrite Bead Case / Package
Impedance @ 100MHz
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Inner Diameter
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Product Range
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DC Resistance Max
Impedance Tolerance
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Product Width
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Ferrite Mounting
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73M9104

RoHS

Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
10+
$0.136
25+
$0.119
50+
$0.107
100+
$0.097
250+
$0.084
More Pricing...
Min: 10 / Mult: 10
0603 [1608 Metric]
-
700ohm
-
200mA
EMIFIL BLM18HG Series
-
1ohm
± 25%
1.6mm
-
0.8mm
0.8mm
SMD
-55°C
125°C
-
-
73M9170

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.025
10+
$0.025
25+
$0.025
50+
$0.025
100+
$0.025
More Pricing...
Min: 1 / Mult: 1
0805 [2012 Metric]
-
60ohm
-
3.5A
EMIFIL BLM21PG Series
-
0.02ohm
± 25%
2mm
-
1.25mm
0.85mm
SMD
-55°C
125°C
-
-
55R1510

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.109
10+
$0.065
25+
$0.053
50+
$0.051
100+
$0.048
More Pricing...
Min: 1 / Mult: 1
0603 [1608 Metric]
-
220ohm
-
2.2A
EMIFIL BLM18KG Series
-
50mohm
± 25%
1.6mm
-
0.8mm
0.8mm
SMD
-55°C
125°C
-
-
73M9050

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.109
10+
$0.062
25+
$0.049
50+
$0.047
100+
$0.045
More Pricing...
Min: 1 / Mult: 1
0603 [1608 Metric]
-
1kohm
-
400mA
EMIFIL BLM18AG Series
-
500mohm
± 25%
1.6mm
-
0.8mm
0.8mm
SMD
-55°C
125°C
-
-
55R1514

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.109
10+
$0.068
25+
$0.053
50+
$0.051
100+
$0.048
More Pricing...
Min: 1 / Mult: 1
0603 [1608 Metric]
-
600ohm
-
1.3A
EMIFIL BLM18KG Series
-
150mohm
± 25%
1.6mm
-
0.8mm
0.8mm
SMD
-55°C
125°C
-
-
97K4330

RoHS

Date/Lot Code

Each
10+
$0.018
100+
$0.018
500+
$0.018
1000+
$0.018
5000+
$0.018
More Pricing...
Min: 10 / Mult: 10
Axial Leaded
-
134ohm
0.65mm
3A
-
-
-
-
9mm
-
-
-
Through Hole
-
-
-
-
73M9090

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.261
10+
$0.183
25+
$0.160
50+
$0.145
100+
$0.130
More Pricing...
Min: 1 / Mult: 1
0603 [1608 Metric]
-
260ohm
-
2A
EMIFIL BLM18EG Series
-
50mohm
± 25%
1.6mm
-
0.8mm
0.8mm
SMD
-55°C
125°C
-
-
08P2430

RoHS

Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
10+
$0.209
25+
$0.208
50+
$0.208
100+
$0.193
250+
$0.190
More Pricing...
Min: 10 / Mult: 10
0603 [1608 Metric]
-
30ohm
-
3A
WE-CBF Series
-
0.04ohm
± 25%
1.6mm
-
0.8mm
0.8mm
SMD
-55°C
125°C
AEC-Q200
-
73M9164

RoHS

Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
10+
$0.125
25+
$0.111
50+
$0.100
100+
$0.091
250+
$0.079
More Pricing...
Min: 10 / Mult: 10
0805 [2012 Metric]
-
22ohm
-
6A
EMIFIL BLM21PG Series
-
9000µohm
± 25%
2mm
-
1.25mm
0.85mm
SMD
-55°C
125°C
AEC-Q200
-
73M9166

RoHS

Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
10+
$0.125
25+
$0.111
50+
$0.100
100+
$0.091
250+
$0.079
More Pricing...
Min: 10 / Mult: 10
0805 [2012 Metric]
-
220ohm
-
2A
EMIFIL BLM21PG Series
-
0.045ohm
± 25%
2mm
-
1.25mm
0.85mm
SMD
-55°C
125°C
AEC-Q200
-
21K5180

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.260
25+
$0.177
50+
$0.155
Min: 1 / Mult: 1
Axial Leaded
-
61ohm
-
-
-
-
-
-
4.45mm
-
-
-
Through Hole
-55°C
125°C
-
-
50B3456

RoHS

Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.422
25+
$0.288
50+
$0.258
100+
$0.236
250+
$0.210
More Pricing...
Min: 1 / Mult: 1
-
-
78ohm
-
5A
-
-
1.2mohm
-
9.6mm
-
3.05mm
2.85mm
SMD
-55°C
125°C
-
-
73M9109

RoHS

Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.109
10+
$0.065
25+
$0.051
50+
$0.048
100+
$0.045
More Pricing...
Min: 1 / Mult: 1
0603 [1608 Metric]
-
120ohm
-
2A
EMIFIL BLM18PG Series
-
50mohm
± 25%
1.6mm
-
0.8mm
0.8mm
SMD
-55°C
125°C
-
-
73M9167

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.124
10+
$0.087
25+
$0.069
50+
$0.067
100+
$0.064
More Pricing...
Min: 1 / Mult: 1
0805 [2012 Metric]
-
220ohm
-
2A
EMIFIL BLM21PG Series
-
0.045ohm
± 25%
2mm
-
1.25mm
0.85mm
SMD
-55°C
125°C
-
-
73M9169

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.122
10+
$0.087
25+
$0.069
50+
$0.066
100+
$0.063
More Pricing...
Min: 1 / Mult: 1
0805 [2012 Metric]
-
330ohm
-
1.5A
EMIFIL BLM21PG Series
-
70mohm
± 25%
2mm
-
1.25mm
0.85mm
SMD
-55°C
125°C
-
-
73M9025

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.107
10+
$0.047
25+
$0.038
50+
$0.036
100+
$0.034
More Pricing...
Min: 1 / Mult: 1
0402 [1005 Metric]
-
600ohm
-
300mA
EMIFIL BLM15AG Series
-
600mohm
± 25%
1mm
-
0.5mm
0.5mm
SMD
-55°C
125°C
-
-
73M9091

RoHS

Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
10+
$0.184
25+
$0.160
50+
$0.145
100+
$0.130
250+
$0.112
More Pricing...
Min: 10 / Mult: 10
0603 [1608 Metric]
-
300ohm
-
1A
EMIFIL BLM18EG Series
-
150mohm
± 25%
1.6mm
-
0.8mm
0.5mm
SMD
-55°C
125°C
-
-
73M9057

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.109
10+
$0.063
25+
$0.050
50+
$0.048
100+
$0.046
More Pricing...
Min: 1 / Mult: 1
0603 [1608 Metric]
-
600ohm
-
500mA
EMIFIL BLM18AG Series
-
0.38ohm
± 25%
1.6mm
-
0.8mm
0.8mm
SMD
-55°C
125°C
-
-
73M9168

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.122
10+
$0.085
25+
$0.069
50+
$0.066
100+
$0.063
More Pricing...
Min: 1 / Mult: 1
0805 [2012 Metric]
-
30ohm
-
4A
EMIFIL BLM21PG Series
-
14mohm
-
2mm
-
1.25mm
0.85mm
SMD
-55°C
125°C
-
-
73M9095

RoHS

Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.030
10+
$0.030
25+
$0.030
50+
$0.030
100+
$0.030
More Pricing...
Min: 1 / Mult: 1
0603 [1608 Metric]
-
600ohm
-
500mA
EMIFIL BLM18EG Series
-
0.35ohm
± 25%
1.6mm
-
0.8mm
0.8mm
SMD
-55°C
125°C
-
-
73M9051

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.109
10+
$0.062
25+
$0.047
50+
$0.046
100+
$0.044
More Pricing...
Min: 1 / Mult: 1
0603 [1608 Metric]
-
120ohm
-
500mA
EMIFIL BLM18AG Series
-
0.18ohm
± 25%
1.6mm
-
0.8mm
0.8mm
SMD
-55°C
125°C
-
-
73M9155

RoHS

Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.235
10+
$0.167
25+
$0.147
50+
$0.133
100+
$0.119
More Pricing...
Min: 5 / Mult: 5
0805 [2012 Metric]
-
2.7kohm
-
200mA
EMIFIL BLM21BD Series
-
0.8ohm
± 25%
2mm
-
1.25mm
1.25mm
SMD
-55°C
125°C
-
-
73M9023

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.107
10+
$0.047
25+
$0.038
50+
$0.035
100+
$0.033
More Pricing...
Min: 1 / Mult: 1
0402 [1005 Metric]
-
120ohm
-
500mA
EMIFIL BLM15AG Series
-
0.25ohm
± 25%
1mm
-
0.5mm
0.5mm
SMD
-55°C
125°C
-
-
55R1509

RoHS

Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
10+
$0.068
25+
$0.052
50+
$0.050
100+
$0.048
250+
$0.042
More Pricing...
Min: 10 / Mult: 10
0603 [1608 Metric]
-
120ohm
-
3A
EMIFIL BLM18KG Series
-
30mohm
± 25%
1.6mm
-
0.8mm
0.6mm
SMD
-55°C
125°C
-
-
55M4338

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
$0.037
25+
$0.037
50+
$0.037
100+
$0.037
250+
$0.037
More Pricing...
Min: 1 / Mult: 1
0805 [2012 Metric]
-
600ohm
-
2A
ILHB Series
-
100mohm
± 25%
2mm
-
1.25mm
0.9mm
SMD
-55°C
125°C
-
-
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