CTX66-19501-R

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Common Mode Chokes: CTX66-19501-R

Common mode chokes are electrical components used to suppress common-mode interference in power supply, analog and digital signal wires as well as communication lines. The CTX66-19501-R is a common mode choke specifically designed for various electrical applications such as EMC filtering, DC/DC converters and power supplies. This article will discuss the application field and working principle of this part.

Applications

The CTX66- 19501-R can be used in various applications for the filtering of EMI, RFI, and spikes. It can be used to filter common-mode noise due to its L/C structure and high impedance in the frequency range of up to 100MHz. It is especially suitable for high-frequency applications such as computers, laptops, LCD/LED TVs, as well as audio systems where common mode noise is likely to occur. Additionally, it can be used for EMI, RFI, and transient suppression in DC/DC converters, power supplies, and medical equipment.

Design

The CTX66-19501-R is a 4-pin component with a block design. It has an inductance of 66µH. Its terminal type is pan-head with a rated current of 1100mA at 25℃. This part also features a low DC resistance, which is 0.367ohms. It has a height of 9.1mm. It is recognized as RoHS compliant, which enables it to be used in hazardous and environmentally unsafe regions. Furthermore, its excellent temperature characteristics enable it to operate at temperatures ranging from -40℃ to +85℃.

Working Principle

The CTX66-19501-R is a common mode choke that works on the principle of impedance matching. It is comprised of a ferromagnetic core and two independent windings, one for common-mode and one for differential-mode signals. The two windings are connected in series to provide high impedance, low loss, and an efficient DC block as well as an output filter. The ferromagnetic core works to reduce leakage inductance by absorbing the energy from the signal, which lowers the inductive coupling between the two windings and improves electromagnetic compatibility. Additionally, the windings are designed to have equal inductance values such that common-mode signals are blocked while differential-mode signals are allowed to pass through. This ensures that only the desired signal is passed while the unwanted common-mode signal is supressed.

Conclusion

In summary, the CTX66-19501-R is a common mode choke specifically designed to reduce or eliminate common mode noise. Its four-pin block design, high inductance, low DC resistance, and excellent temperature characteristics make it suitable for many applications such as EMI, RFI, and transient suppression in DC/DC converters, power supplies, and medical equipment. Additionally, its low inductive coupling and high impedance allow it to effectively block common-mode signals while allowing desired differential-mode signals to pass through intact.

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