CM1622-08DE

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Electromagnetic interference (EMI), also called radio-frequency interference (RFI), is the electromagnetic radiation that can interfere with the proper functioning of electrical devices or systems. EMI/RFI Filters are used to reduce this interference in electrical systems, and the CM1622-08DE filter is an example of these types of filters.

The CM1622-08DE is a RoHS-compliant common mode filter designed for harsh environment applications such as process control, programmable logic controllers (PLCs), automotive and industrial control systems. It is a multilayer filter that measures 4 mm x 4 mm and is rated up to 40V. It is suitable for applications that require operating temperatures ranging from -40°C to +125°C.

The filter contains two single layer coils with one/two capacitors inside a metal case encasement, providing excellent shielding performance. The coils are housed in two common mode filter assemblies, with one on each side of the main PCB. They are designed to reduce EMI and RFI noise generated by high frequency signals, and help ensure higher system reliability.

The filter operates by attenuating common mode electromagnetic noise and preventing it from propagating further into the system. It works by creating a low-impedance path between the noise source and the system, where the noise is dissipated. This is achieved by the physical properties of the filter itself, as well as by the insertion of an electrical filter in the circuit connected to the source of the noise. The electrical filter is made up of the two single layer coils and the capacitors, and their combined inductance and capacitance form the low-impedance path. The filter also contains a shield to reduce the coupling of the noise onto other circuits, as well as a ferrite core to absorb any remaining EMI or RFI signals.

In addition to providing EMI/RFI filtering, the filter helps ensure that the system complies with international safety and EMC standards. It also provides Galvanic isolation, allowing the use of wireless networking technologies while preventing damage to the system. It is especially effective in reducing power line noise from motors and common mode spikes from digital circuits.

The CM1622-08DE filter is an excellent choice for applications that require EMI/RFI filtering in harsh environments. It is robust and reliable, and provides the protection and performance needed to keep a system running at peak efficiency.

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