What is SMT magnetic bead? What is the difference between SMT magnetic bead and SMT inductor 2

Now let's compare patch magnetic beads and patch inductors:

1. Impedance frequency characteristics:

Surface mount magnetic beads: They exhibit low impedance at low frequencies and high impedance at high frequencies, and are frequency dependent impedance devices. diode

Surface mount inductor: It has almost no obstruction to DC signals and produces impedance to AC signals. The impedance increases with frequency, but it does not have as significant frequency dependence as magnetic beads.

2. Application scenarios:

Surface mount magnetic beads: mainly used to suppress high-frequency noise, often placed on power or signal lines to protect sensitive electronic devices from high-frequency EMI interference.

Surface mount inductors are widely used in power filtering, signal coupling, energy storage, and time delay applications, such as filtering circuits and oscillation circuits in switching power supplies.diode

3. Structural differences:

Surface mount magnetic beads: made of ferrite material, usually in the shape of a small cylindrical or similar shape.

Surface mount inductor: It is made by winding a conductive coil and may have a magnetic core or coreless design.diode

4. Circuit symbol:

Surface mount magnetic beads are usually represented by an inductance symbol with two small dashed lines in circuit diagrams.diode