What is the typical impedance range of common mode inductors made of different magnetic core materials at a frequency of 1MHz?

The impedance value of a common-mode inductor is closely related to its core material, size, number of turns, and leakage design. The following is the impedance range of typical materials at 1MHz:

 MnZn Ferrite: High magnetic permeability and low loss at low frequencies, suitable for suppressing low-frequency interference.

 Typical impedance: approximately 10Ω ~ 1kΩ (higher impedance when inductance is higher).

 Nickel-Zinc Ferrite (NiZn Ferrite): It has a low initial permeability and low high-frequency loss, making it suitable for suppression in high-frequency bands (such as 1MHz~300MHz).

 Typical impedance: Reaching from hundreds of ohms to several kilo-ohms, with stronger high-frequency suppression capability.

 Powdered Iron: low magnetic permeability, good saturation characteristics, suitable for high current applications, but low impedance at high frequencies (typically below tens of ohms).

Nanocrystalline: It combines high magnetic permeability and high-frequency characteristics. At 1MHz, its impedance is close to that of optimally designed ferrite, but its cost is higher.