SSR21H-06425

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Common Mode Chokes (CMC) are used in various applications to reduce the amount of interference that can be introduced onto a circuit by electromagnetic forces. The SSR21H-06425 is a CMC designed for use with high-frequency DC power supplies. The exact working principle and its application field for the SSR21H-06425 will be discussed in this article.

The SSR21H-06425 is a Common Mode Choke (CMC) that is suitable for the DC voltage range from 200V to 400V and has an insulation voltage of 500V. This device is constructed of three magnetically shielded core legs for excellent suppression performance. It is designed for operation in the high-frequency range from 400kHz to 800kHz, and it features an attenuation of 50 dB for frequencies above 600kHz.

The SSR21H-06425 is a three-legged magnetic device consisting of two different materials. The two center legs are composed of high-permeability cores made of NiZn material and a bobbins made of ceramics that are able to provide a higher impedance and more efficient suppression at all frequencies. The outer leg is made from ferrite magnetic material, which acts as a dummy coil and gives the device a higher impedance. This also helps to reduce the device\'s inductance at frequencies below 400kHz.

The SSR21H-06425 is mainly used in applications where high amounts of electromagnetic interference can be found. Its best application field is in high frequency DC power supplies due to its superior attenuation levels and excellent EMI suppression capabilities at any frequency above 400kHz. It is also suitable for SMPS applications, such as those found in LED lighting systems, motor drives, and battery chargers.

The working principle of the SSR21H-06425 relies on the fact that it is composed of two different magnetic materials. The two center legs consist of high-permeability cores that act as a choke and provide an impedance to any unwanted electromagnetic interference. The outer leg is made from ferrite magnetic material, which serves as a dummy coil and provides higher impedance, further reducing the device\'s inductance at frequencies below 400kHz. The ceramics core extends the operation range of the SSR21H-06425 to frequencies up to 800kHz, ensuring excellent suppression of electromagnetic noise.

In conclusion, the SSR21H-06425 is a Common Mode Choke (CMC) designed to work in the high-frequency DC power supply range from 200V to 400V. It is composed of three magnetically shielded core legs that provide superior interference suppression at any frequency above 400kHz. The outer leg is made from ferrite magnetic material and the two center legs are composed of NiZn material that serves to reduce the device\'s inductance at frequencies below 400kHz. The device\'s best application field is in high frequency DC power supplies, but it can also be used in SMPS applications for LED lighting systems, motor drives and battery chargers.

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