FK2125T406AL-T

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EMI/RFI Filters (LC, RC Networks) are used to protect against electromagnetic interference (EMI) and radio frequency interference (RFI). The FK2125T406AL-T is an EMI/RFI Filter specifically designed to provide effective EMI/RFI filtering by combining a ferrite bead with capacitor technology.

The FK2125T406AL-T is composed of a ferrite bead core with an inductance of 120nH ±20%, four 4.7µF ceramic capacitors. The ferrite core is typically used as an EMI filter of series resonant circuits and provides choke action and high-frequency attenuation characteristics. The ceramic capacitors provide protection from EMI and RFI by blocking high-frequency noise and attenuating low-frequency noise. This filter provides a significant improvement in system noise immunity by reducing EMI/RFI and improving analog and digital signal integrity.

The FK2125T406AL-T is typically used in applications where space is limited, such as mobile phones, personal computers, networking equipment, and consumer electronics. It is suitable for low voltage (0-50V) applications with a maximum current rating of 16A. This filter is also resistant to shock and vibration and offers a high level of reliability due to the use of durable components.

The main principle of operation of the FK2125T406AL-T is to combine the series inductance of the ferrite bead with the parallel capacitance of the ceramic capacitors to reduce EMI/RFI. The ferrite bead provides a series inductance, which creates an impedance between its leads. This impedance allows the ferrite core to absorb and block high frequency EMI energy. The 4.7µF capacitors form a low-pass filter, which attenuates low frequency RFI.

The FK2125T406AL-T filter provides excellent EMI and RFI attenuation across a range of frequencies. It can reject noise in the range of 10KHz to 1GHz, providing protection against interference from numerous sources including mobile phones, Wi-Fi networks, and Bluetooth devices. This filter also has a low DC resistance and inductance that allows it to be used in higher speed digital systems.

In conclusion, the FK2125T406AL-T EMI/RFI filter is an effective means of filtering out unwanted EMI/RFI signals from a variety of sources. It is well-suited for applications such as mobile phones, personal computers, networking equipment, and consumer electronics that require both space efficiency and signal integrity. With its robust design and wide frequency range, the FK2125T406AL-T filter gives users the peace of mind knowing that their system will be shielded from unwanted EMI/RFI interference.

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