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
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1515671

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Each (Supplied on Cut Tape)
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RM0.263
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RM0.189
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RM0.133
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0603 [1608 Metric]
1kohm
400mA
EMIFIL BLM18AG Series
0.5ohm
± 25%
1.6mm
0.8mm
0.8mm
SMD
-55°C
125°C
-
1515671RL

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RM0.099
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0603 [1608 Metric]
1kohm
400mA
EMIFIL BLM18AG Series
0.5ohm
± 25%
1.6mm
0.8mm
0.8mm
SMD
-55°C
125°C
-
3650626

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RM0.120
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0603 [1608 Metric]
120ohm
400mA
MMZ Series
0.3ohm
± 25%
1.6mm
0.8mm
0.6mm
SMD
-55°C
125°C
-
3650626RL

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RM0.097
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0603 [1608 Metric]
120ohm
400mA
MMZ Series
0.3ohm
± 25%
1.6mm
0.8mm
0.6mm
SMD
-55°C
125°C
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3996434

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0603 [1608 Metric]
180ohm
400mA
BMC Series
0.2ohm
± 25%
1.6mm
0.8mm
0.8mm
SMD
-55°C
125°C
-
3996432RL

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0603 [1608 Metric]
120ohm
400mA
BMC Series
0.15ohm
± 25%
1.6mm
0.8mm
0.8mm
SMD
-55°C
125°C
-
4015946

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RM0.505
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RM0.393
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RM0.224
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RM0.152
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RM0.129
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1206 [3216 Metric]
470ohm
400mA
MU Series
0.35ohm
± 25%
3.2mm
1.6mm
1.1mm
SMD
-55°C
125°C
-
4015949RL

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500+
RM0.152
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1206 [3216 Metric]
75ohm
400mA
MU Series
0.2ohm
± 25%
3.2mm
1.6mm
1.1mm
SMD
-55°C
125°C
-
4015949

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Each (Supplied on Cut Tape)
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RM0.457
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1206 [3216 Metric]
75ohm
400mA
MU Series
0.2ohm
± 25%
3.2mm
1.6mm
1.1mm
SMD
-55°C
125°C
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3996432

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Each (Supplied on Cut Tape)
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RM0.244
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RM0.207
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RM0.193
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RM0.142
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0603 [1608 Metric]
120ohm
400mA
BMC Series
0.15ohm
± 25%
1.6mm
0.8mm
0.8mm
SMD
-55°C
125°C
-
3996434RL

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Each (Supplied on Cut Tape)
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0603 [1608 Metric]
180ohm
400mA
BMC Series
0.2ohm
± 25%
1.6mm
0.8mm
0.8mm
SMD
-55°C
125°C
-
4015946RL

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Each (Supplied on Cut Tape)
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Packaging Options
500+
RM0.152
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RM0.129
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Min: 500 / Mult: 5
1206 [3216 Metric]
470ohm
400mA
MU Series
0.35ohm
± 25%
3.2mm
1.6mm
1.1mm
SMD
-55°C
125°C
-
3996433

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Each (Supplied on Cut Tape)
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0603 [1608 Metric]
150ohm
400mA
BMC Series
0.15ohm
± 25%
1.6mm
0.8mm
0.8mm
SMD
-55°C
125°C
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3996433RL

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Each (Supplied on Cut Tape)
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RM0.164
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RM0.144
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RM0.131
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RM0.112
Min: 500 / Mult: 10
0603 [1608 Metric]
150ohm
400mA
BMC Series
0.15ohm
± 25%
1.6mm
0.8mm
0.8mm
SMD
-55°C
125°C
-
1669708

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Each (Supplied on Cut Tape)
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RM0.245
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RM0.173
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RM0.133
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RM0.119
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RM0.117
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0603 [1608 Metric]
1kohm
400mA
MMZ Series
0.5ohm
± 25%
1.6mm
0.8mm
0.8mm
SMD
-55°C
125°C
-
2292353

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Each (Supplied on Cut Tape)
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RM6.390
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1206 [3216 Metric]
300ohm
400mA
DA Series
0.4ohm
-
3.2mm
1.6mm
1.6mm
SMD
-40°C
125°C
-
3386886

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Each (Supplied on Cut Tape)
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RM0.291
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RM0.211
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RM0.170
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RM0.146
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RM0.125
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Min: 10 / Mult: 10
0603 [1608 Metric]
1kohm
400mA
MMZ Series
0.5ohm
± 25%
1.6mm
0.8mm
0.8mm
SMD
-55°C
125°C
AEC-Q200
3551383

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Each (Supplied on Cut Tape)
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RM1.020
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0402 [1005 Metric]
220ohm
400mA
WE-CBA Series
0.3ohm
± 25%
1mm
0.5mm
0.5mm
SMD
-55°C
125°C
AEC-Q200
3386772

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Each (Supplied on Cut Tape)
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RM0.272
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RM0.194
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0402 [1005 Metric]
120ohm
400mA
MMZ Series
0.18ohm
± 25%
1mm
0.5mm
0.5mm
SMD
-55°C
125°C
AEC-Q200
3518669

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RM0.222
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RM0.152
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RM0.125
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RM0.107
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0603 [1608 Metric]
60ohm
400mA
ILBB-0603 Series
0.1ohm
± 25%
1.6mm
0.8mm
0.8mm
SMD
-55°C
125°C
-
2889907

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Each
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RM0.533
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RM0.313
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RM0.157
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0603 [1608 Metric]
300ohm
400mA
MFB Series
0.3ohm
± 25%
1.6mm
0.8mm
0.8mm
SMD
-55°C
125°C
-
3386798

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Each (Supplied on Cut Tape)
Cut Tape
10+
RM0.283
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RM0.205
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RM0.163
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RM0.145
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RM0.128
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Min: 10 / Mult: 10
0603 [1608 Metric]
1kohm
400mA
MMZ Series
0.5ohm
± 25%
1.6mm
0.8mm
0.8mm
SMD
-55°C
125°C
AEC-Q200
3386397

RoHS

Each (Supplied on Cut Tape)
Cut Tape
10+
RM0.842
100+
RM0.594
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RM0.456
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RM0.401
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RM0.346
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0402 [1005 Metric]
200ohm
400mA
MAF Series
0.7ohm
-
1mm
0.5mm
0.5mm
SMD
-55°C
125°C
-
2292424

RoHS

Each (Supplied on Cut Tape)
Cut Tape
10+
RM0.676
500+
RM0.373
2500+
RM0.331
10000+
RM0.258
25000+
RM0.253
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0402 [1005 Metric]
120ohm
400mA
LI Series
0.4ohm
-
1.01mm
0.5mm
0.5mm
SMD
-40°C
125°C
-
3386761

RoHS

Each (Supplied on Cut Tape)
Cut Tape
10+
RM0.290
100+
RM0.208
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RM0.167
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RM0.111
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RM0.108
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Min: 10 / Mult: 10
0402 [1005 Metric]
22ohm
400mA
MMZ Series
0.17ohm
± 25%
1mm
0.5mm
0.5mm
SMD
-55°C
125°C
AEC-Q200
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