DSS1NB32A222Q91A Filters

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EMI/RFI filters are a type of passive electrical network effectively used to suppress electromagnetic interference (EMI) and radio-frequency interference (RFI). The circuits are generally variably configured and consist of combinations of inductors (L) and capacitors (C), and sometimes resistors (R). For example, the letters “LC” usually refer to low-pass filters made up of one inductor and one capacitor, whereas the letters “RC” indicate a high-pass filter consisting of one resistor and one capacitor.

Within EMI/RFI filter designs, DSS1NB32A222Q91A is an especially popular product due to its high performance, wide application field and relatively low cost. The DSS1NB32A222Q91A is a power-filtering signal line filter with a frequency rating of up to 250 MHz and a comprehensive combination of both differential mode and common mode filtering. It has the advantages of good frequency-domain performance, small size, long life, small loss and energy-saving. Owing to these characteristics, it is widely used in many industrial control applications.

Basically, the DSS1NB32A222Q91A consists of five stages of low-pass electromagnetic interference (EMI) filters, each containing one inductor and two capacitors. The inductors have an inductance ranging from 0.2 to 2.22 μH and the capacitors range from 0.068 to 0.22 μF. The low-pass filter reduces the amplitude of higher-frequency noise to very low levels, while still enabling substantial signal frequencies to pass through unaffected. The total attenuation of EMI is greater than 40 dB in the range of 20 MHz - 2 GHz.

The working principle of the DSS1NB32A222Q91A is evaluated by the so-called low-frequency noise power versus frequency distribution. In this manner, the maximum attenuation is obtained at lower frequencies and the attenuation performance at high frequencies is also checked. From practical tests, it was concluded that the DSS1NB32A222Q91A in particular is excellent at suppressing EMI in the frequency range of 100-500 MHz.

In addition to its impressive performance, the DSS1NB32A222Q91A also features a wide range of applications in industrial controls and automation. It is commonly used in monitoring and controlling systems for industrial automation environments, instrumentation systems, and process control networks. Furthermore, it can be found in consumer electronics and home automation products, including broadband internet routers, digital cameras, cordless phones, and GPS trackers.

In summary, the DSS1NB32A222Q91A is an optimal filter product for EMI/RFI applications, due to its reliable performance, wide application field and modest cost. It consists of five stages of low-pass electromagnetic interference (EMI) filters, with an overall attenuation of more than 40dB. Its working principle is based on the low-frequency noise power versus frequency distribution, where maximum attenuation is observed at lower frequencies. It is now widely used in automation and instrumentation industries, as well as in consumer electronics products.

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