SSHB21H-R30050

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Common mode chokes are widely used in power supply and other circuits and systems. SSHB21H-R30050 is one of the more popular common mode chokes in the market. It features a high inductance value in the range of 10-300μH and a current rating of 5A. It is a widely used in filtering, EMI/RFI noise suppression, power supply protection and other applications.

One of the uses of a common mode choke is in the power supply, where it is used to filter out the noise created by the switching power supply. It is connected in series between the power supply and the load, allowing only the desired signal to pass through while blocking out undesirable signals. The common mode choke usually works together with a bypass capacitor to further filter the power supply. The combination acts as a low-pass filter, reducing the noise level at the output.

Another common application of the common mode choke is for EMI/RFI suppression. Such common mode chokes are also known as line filters, and they are used to protect two-wire systems from the effects of external interference. In this case, the common mode choke is connected in series with the input signal and the device, with the combined inductance of both the common mode choke and the device being used to attenuate the EMI or RFI signal.

In addition, common mode chokes are used in motor drive systems for unidirectional power supply protection. They are connected in series between the power supply and the load, providing a low impedance path for the power supply while blocking the power supply from passing through to the load. This provides protection from over-voltage and inrush current which can damage motor drive systems.

The working principle of a common mode choke is based on inductance. The inductance of the choke is usually provided by a wound coil of wire, and it is designed to produce an inductance that attenuates the noise at the desired frequency. The more windings the choke has, the higher the inductance and the better the attenuation.

When an electrical signal passes through a common mode choke, it is inducted by the choke’s magnetic field, resulting in it being attenuated at the output. This attenuation is typically in the range of 20-30dB, and it is used to reduce the noise in the electrical signal.

Common mode chokes are available in a variety of ratings, making them ideal for a variety of applications. The SSHB21H-R30050 is a popular model, offering 10-300μH of inductance and a current rating of 5A. It can be used in power supply filtering, EMI/RFI noise suppression, power supply protection, and other applications.

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