7356-H-RC

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Common Mode Chokes

Common mode choking is the use of a coil and capacitance to filter out unwanted currents that are common to two or more electrical circuits. The common mode choke is made up of a coil and two capacitors arranged in a fashion so as to allow AC signals to pass along the power supply line while reducing the amount of common mode noise. The design of the common mode choke is such that the frequency of the AC signal is forced towards the middle of the frequency band, while at the same time reducing the amplitude of the signal. The capacitors act as filters triggering the inductor to saturate or peak at the reduced amplitude level.

The 7356-H-RC application field and working principle is an example of a common mode choke. The 7356-H-RC application field is specifically designed to help reduce EMS noise generated from high-frequency switching power supplies, such as copiers, printers and notebook computer power supplies. The 7356-H-RC common mode choke is constructed out of two bipolar ceramic capacitors which has a common winding of 0.7mm enameled copper wire. The choke’s inductance value is around 28 μH. The two capacitors have a differential impedance of 0.001 - 0.003 Ohms and maximum current rating of 0.9 Amps.

Working Principle

When a differential or common-mode signal passes through the common mode choke, the coil inductance has an effect on the signal current, thereby limiting the high frequency component of the differential mode noise and the common mode noise. In addition, the capacitors filter the signal current as it passes through the choke and as a result, the common mode choke also reduces the amount of DC current. This reduces both the differential mode noise and the common mode noise.

The 7356-H-RC common mode choke works by creating an electromagnetic field around the two capacitors. This field absorbs the current noise generated by the power supply, and thereby reduces it. The choke also helps to reduce the noise generated by the power supply further by creating a higher impedance in the power line. This makes it difficult for the higher frequencies to pass through the choke, which further reduces the amount of noise generated.

The 7356-H-RC is used mainly due to its high efficiency in reducing the EMS noise. The choke has a good frequency response and offers a high degree of noise reduction. The choke is also easy to install and requires minimal maintenance. The choke also helps to increase the life of the power supply as the EMS noise is reduced significantly.

In conclusion, the 7356-H-RC application field and working principle is an excellent example of a common mode choke. The choke is an effective way of reducing the noise generated from high-frequency switching power supplies. The choke is also easy to install, and requires minimal maintenance. The 7356-H-RC is a great way to reduce the amount of EMS noise generated by high-frequency switching power supplies and extend the life of the power supply.

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