4214R-4

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The 4214R-4 is a ceramic ferrite bead and chip produced by Coilcraft. It is a chip-size surface mount inductor, specially designed to suppress high frequency noise in switching supplies and general-purpose power circuits. The inductance of the 4214R-4 is 4.7μH at 100 kHz, and it features excellent DC current saturation capability, high current rating of up to 4A, and high frequency performance to 1 GHz.

The 4214R-4 is used for power supply line filtering, EMI suppression, on-board filtering and other applications where a small size and high current handling are required. The small substrate of the 4214R-4 allows for a reduced surface area with a much higher inductance than other solutions, making it ideal for applications where space is limited. The bead offers excellent shielding effectiveness and EMI/RFI shielding performance to eliminate interference without degrading the signal quality of the circuit.

The 4214R-4 is a type of magnetic ferrite bead composed of two elements: a core comprised of a magnetic material known as ferrite and a coil wrapped around the core. As electric current flows through the ferrite core, it creates an electromagnetic field around the core, creating a magnetic flux which induces a current in the coil. This current acts to oppose the current flowing through the core, creating a dampening effect and allowing the effective series impedance to increase with increasing frequency.

In the case of the 4214R-4, this impedance is very useful in suppressing high frequency noise. As the frequency of the signal increases, the inductive impedance of the ferrite bead increases and the high frequency noise is reduced. This dampening effect is also known as “lossy” loss, and the 4214R-4 has been designed to ensure lossy loss at frequencies up to 1GHz.

The 4214R-4 is also designed to handle high-current, up to 4A, which is quite impressive for a chip-size surface mount component. This is due to its high power rating, which is assisted by the high-saturation core. The high saturation core also helps to reduce the inductance values of the 4214R-4 at high frequencies, meaning it can effectively block high-frequency noise without compromising circuit performance.

The 4214R-4 is an extremely useful component for suppressing high frequency noise in a variety of applications, due to its small size, high current handling and excellent frequency performance. Its applications range from power supply line filtering to on-board filtering, and its excellent EMI protection makes it suitable for use as a shield against interference.

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