CM1812X330R-00 Filters

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Common mode chokes are an essential component of many electronic systems, providing reliable insulation from noise, ground-loop current, and other electrical interference. The CM1812X330R-00 is a high-performance common mode choke designed specifically for the power-conversion applications and is designed to deliver reliable performance over a wide frequency range, from low power complementary metal–oxide–semiconductor (CMOS) circuits to high-power, wideband power amplifiers. Its compact size and tight electromagnetic interference (EMI) suppression characteristic enable it to provide the right solution for a wide variety of applications.

The CM1812X330R-00 application field includes, but not limited to, power converters, DC/DC converters and inverters, motor drives, AC/DC rectifiers, and amplifiers. It is commonly used in mobile device and computer power applications. Its size and shape, coupling coefficient, current rating, and insulation make it suitable for a wide range of configurations, from power circuit to noise suppression.

The CM1812X330R-00 common mode choke features double-shielded construction, with a ferrite core and wire windings. The ferrite core provides roughly 85% common-mode rejection, occupying a compact footprint and delivering a low DC resistance. The wire windings provide common-mode current control and EMI suppression. The double-shielded construction ensures optimal electromagnetic compatibility (EMC) performance.

The working principle of the CM1812X330R-00 is to oppose signals in the common-mode frequency range, while allowing a low enough DC resistance to maintain signal integrity in the power circuit. The current flows through both the ferrite core and the wire windings of the common mode choke, which is why it is also known as an inductive choke. The wire windings have an inductance that absorbs the common-mode noise signals, and provides a low enough DC resistance to ensure a clean power delivery.

In order to achieve high effective common-mode rejection (EMC), the CM1812X330R-00 operates across the entire common-mode frequency range. Its high inductance and good coupling coefficient ensure maximum EMC performance. Additionally, the tight construction provides lower coupling inductance along with superior EMC performance.

The tight-tolerance, tight-handling construction reduces component size and cost, making the CM1812X330R-00 a popular choice for many higher voltage applications due to its superior insulation and reliable performance over the wide frequency range. Apart from its high common-mode rejection and EMC performance, the other advantages of the CM1812X330R-00 common-mode choke include better noise immunity, low transmission losses, low leakage inductance, and low turning on and off times.

The CM1812X330R-00 common mode choke is designed specifically to provide reliable performance over a wide frequency range, from low power complementary metal oxide semiconductor (CMOS) circuits to high power, wideband power amplifiers. It is a high-performance common mode choke that features double-shielded construction, with a ferrite core and wire windings, providing 85% common-mode rejection in a compact footprint. The ferrite core provides the common-mode rejection over the entire common-mode frequency range, while the wire windings provide common-mode current control and EMI suppression. Its tight-handling construction, coupled with its small size and low DC resistance, make the CM1812X330R-00 ideal for many electronic applications requiring reliable noise, ground-loop current, and other electrical interference suppression.

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