RN212-4-02-0M7

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Common Mode Chokes is a passive component used to exclude or limit common mode current between two different circuits. Since Common Mode Chokes is used to block common mode current and allow differential mode current, it can be used to reduce electromagnetic interference (EMI) from environment noise or interference from other circuits.

RN212-4-02-0M7 is one type of Common Mode Chokes characterized by a long-term stability, ensuring a guaranteed inductance over a specified temperature range. This kind of Common Mode Choke can be used for EMI noise filtering in many applications, such as power systems, automotive electronics, datacom, white goods, mobile phones, notebook computers, handheld appliances, and PDA, etc.

Its application field is very wide. In power system, it can act as a line noise filter; in automotive electronics, it can reduce the noise interference between part of an electric device; in datacom, it can control the signal rising and falling speed; in white goods, it can keep the signal and noise isolated; in mobile phones, it can deal with the signal over-amplification and cracking; and in PDA, it can avoid the mutual interference between system circuits. Its application is not limited to the examples listed.

The working principle of RN212-4-02-0M7 is based on Faraday\'s Law. It states that when a conductor passes through a magnetic field, a voltage is induced in the conductor perpendicular to both the field intensity and the conductor. This phenomenon can be used to construct an important electrical filter, Common Mode Chokes. An electrical current applied to the primary windings of the Common Mode Chokes will induce an equal current in the opposite direction in the secondary windings. By placing the windings on the same core, this will lower the signal to the desired level, blocking DC current and suppressing common mode interference.

In addition to its features of long-term stability and wide application field, this kind of Common Mode Choke also has extensive mechanical options such as PC tail and pull cord type. When selecting a Common Mode Choke, there are some factors such as allowable temperature rise, inductance, DC resistance, exposure to maximum current, and so on, that should be considered. It is important to observe the temperature rise to extend the life of the product, and to eliminate the problems caused by breaking down the insulation of the coil due to heat.

In conclusion, Common Mode Chokes RN212-4-02-0M7 is an ideal EMI filter for wide range of applications. Its application field is very wide, and it has long-term stability and extensive mechanical options. When selecting a Common Mode Choke, it is important to observe the temperature rise and consider all the factors mentioned above.

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