RGCMF1210900H3T Filters

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Common mode chokes have found application in a wide variety of situations. They are common in power electronics, particularly in power converters, where their function is to suppress common-mode emissions, thereby ensuring noise emission standards can be met. Without Common Mode Chokes, significant levels of harmonic distortion are induced in the system, leading to a poor power quality.

The RGCMF1210900H3T is a typical common mode choke designed for EMI suppression. It is a 3-terminal filter-type common mode component, consisting of an inductor and two capacitors. Designed on a single-sided, FR-4 printed circuit board with a copper-plated finish, the choke is designed for SMT mounting and features operating frequency up to 5MHz, CCA up to 100pF, and a current up to 3A. Its inductance value is very low, and this high reactance ability helps reduce the volt-ampere requirement.

The RGCMF1210900H3T can be used in applications such as mobile communication systems, power supplies, audio devices, computer switching power supplies, in-vehicle units, and more. It can be used for both common mode and normal mode interference in all types of electronic equipment.

The working principle of the RGCMF1210900H3T is similar to that of most other common mode chokes which aim to suppress EMI. It works by combining magnetic field waves with capacitive fields. This creates a four-element magnetic-capacitive attenuation network, which helps to minimize interference. The inductance resistances provided by the choke combine with the capacitance provided by the capacitors to create an impedance, which limits the rate of voltage transients and reduces them to harmless levels. This provides effective attenuation of undesired harmonic frequencies as well as limiting EMI generated by the system.

The special design of the RGCMF1210900H3T also results in low transmission loss while providing an impedance in the UHF range. This enhances its immunity to high frequencies. It can also help to reduce excess power consumption by limiting the excessive current from entering the system. Also, its low occupancy on the board ensures efficient EMI suppression.

In conclusion, the RGCMF1210900H3T is an ideal common mode choke for applications requiring low transmission loss and efficient EMI suppression. Its unique design provides the necessary impedance for attenuation of high frequencies while offering low power consumption. Its multiple applications, such as mobile communication systems, power supplies, in-vehicle units, etc., make it an ideal choice for a wide variety of applications.

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