KNH21101-3AA

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EMI/RFI filters are essential components which serve to suppress noise emitted from products, preventing it from interfering with other applications and the environment. There are several kinds of EMI/RFI filters including LC, RC Networks. KNH21101-3AA is an example of RC Networks, which is a combination of inductors, capacitors, diodes, and resistors. In this article, we will discuss the application field and working principle of the KNH21101-3AA.

Application field

KNH21101-3AA is mainly applied in the fields of automotive and industrial. The automotive industry relies on a variety of electronic systems, including engine control systems, navigation systems, brakes, and airbags. In each of these systems, strong EMI protection is necessary to prevent them from being affected by other applications, thus KNH21101-3AA is a perfect choice for providing this protection. In the industrial sector, KNH21101-3AA is used to protect wires, housings, and sensor control systems from EMI and RFI interference.

Working principle

The working principle of the KNH21101-3AA is relatively simple. It uses capacitors, inductors, diodes, and resistors to form an LC, RC Network. This network forms a low-pass filter which suppresses the high frequency noise generated by the electronic system. The capacitors, inductors, and resistors form a series resonant LC filter, which blocks the high frequency noise. The diodes in the circuit form a rectifier, which converts the AC noise into DC noise, and the resistors further block the DC noise. Thus, the KNH21101-3AA is very effective in suppressing the high frequency noise emitted by electronic systems.

In conclusion, the KNH21101-3AA is an effective EMI/RFI filter which is used in the automotive and industrial sectors to protect electronic systems from EMI and RFI interference. It is formed from capacitors, inductors, diodes, and resistors and works by forming a series resonant LC filter, which blocks the high frequency noise. The diodes convert the AC noise into DC noise and the resistors block the DC noise. Thus, the KNH21101-3AA is very effective in suppressing the high frequency noise generated by electronic systems.

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