Ferrite Beads | Murata Chip Ferrite Chokes | RS
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    Ferrite Beads

    Ferrite Beads also known as ferrite chokes are passive devices and they are used to constrict high-frequency signals in electronic components. The ferrite becomes resistive over its intended frequency range and uses up the noise energy in the form of heat.

    How do the ferrite beads work?

    The ferrite bead is connected in series with the power supply rail and is often combined with the capacitors to ground on either side of the bead. This then forms a low-pass filter network, further reducing the high-frequency power supply noise. Use SPICE (Simulation Program with Integrated Circuit Emphasis) or another similar tool to ensure any anti-resonance peaks caused by ferrite or PCB inductive structure does not violate the target impedance limit.

    Ferrite Beads come in two categories:

    • High-Q Beads - typically used as resonators and must not be used in power isolation circuits
    • Low-Q Beads - these are also called absorptive beads and they are lossy and make good filter networks because they are designed to absorb high-frequency noise currents and dissipate it as heat

    What to consider when choosing Ferrite Beads?

    • Make sure that any voltage drop does not cause the target supply rail to fall below the recommended operating conditions of the device
    • The ferrite bead is inductive, therefore do not use it with High-Q decoupling capacitors
    • Applying ferrite beads correctly can be an effective and inexpensive way to reduce high-frequency noise and switching transients

    Where are Ferrite Beads used?

    • Eliminating high-frequency EMI noise on any circuit design
    • Electronic devices such as mobile phones
    • Computers and laptops
    • TV tuners
    • Audio Players
    • DVD's
    • Gaming Systems

    1806 Products showing for Ferrite Beads

    KEMET
    Tape & Reel
    11.5Ω
    17.8Ω
    23Ω
    32.9Ω
    -
    40.4Ω
    2.1A
    Chip Bead
    0.063 x 0.031 x 0.031mm
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    Bourns
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    Bourns
    0603
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    Abracon
    0805
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    KEMET
    Tape & Reel
    22.8Ω
    25.8Ω
    28Ω
    30.5Ω
    -
    30.4Ω
    900mA
    Chip Bead
    0.063 x 0.031 x 0.031mm
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    Bourns
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    KEMET
    Tape & Reel
    112.5Ω
    225Ω
    470Ω
    1266.5Ω
    -
    1500Ω
    4A
    Chip Bead
    0.063 x 0.031 x 0.031mm
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    Bourns
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    0603
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    TE Connectivity
    0603
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    KEMET
    Tape & Reel
    15.1Ω
    30Ω
    60Ω
    155.6Ω
    -
    220Ω
    4A
    Chip Bead
    0.063 x 0.031 x 0.031mm
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    Murata
    0603
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    Chip Ferrite Bead
    1.6 x 0.8 x 0.8mm
    1.6mm
    0.8mm
    0.8mm
    50mΩ
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    Wurth Elektronik
    0402
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    Ferrite Bead
    1 x 0.5 x 0.5mm
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