1. It can be used as a jumper; 2. When wiring, if it cannot be laid, you can add a zero-ohm resistor to bridge it; 3. Under high-frequency signals, it acts as an inductor or capacitor to deal with EMC problems. For example, between different grounds. The equivalent circuit of the magnetic bead is equivalent to a band-stop limiter, which only has a significant suppression effect on the noise of a certain frequency point. When using it, it is necessary to estimate the noise point frequency in advance in order to select the appropriate model. For situations where the frequency is uncertain or unpredictable, magnetic beads are not suitable. Capacitors block direct current and pass alternating current, resulting in floating ground. Inductors are large in size, have many stray parameters, and are unstable. Zero-ohm resistors are equivalent to very narrow current paths, which can effectively limit loop currents and suppress noise. Resistors have attenuation effects in all frequency bands (zero-ohm resistors also have impedance), which is stronger than magnetic beads.
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