- All
- Product Name
- Product Keyword
- Product Model
- Product Summary
- Product Description
- Multi Field Search
English
Views: 1367 Author: Site Editor Publish Time: 2025-04-26 Origin: Site
SQ common mode inductors, making noise nowhere to hide
What is an SQ common mode inductor?
An SQ common mode inductor is an inductive component used to suppress common mode interference. Common mode interference refers to interference signals that exist simultaneously on two or more signal lines and have the same direction.
An SQ common mode inductor is typically composed of two or more windings wound on the same magnetic core. These windings are wound in the same direction, so for differential mode signals (signals on two signal lines with opposite directions), the inductances cancel each other out, providing almost no impedance. However, for common mode signals, the inductances add up, generating a significant impedance and thereby suppressing common mode interference.
Applications of SQ Common Mode Chokes:
SQ common mode chokes are widely used in various electronic devices to suppress common mode interference and enhance the anti-interference capability and electromagnetic compatibility (EMC) performance of the equipment. Common applications include:
Power input terminals: To suppress common mode noise on power lines.
Data line interfaces: Such as USB, HDMI, Ethernet, etc., to suppress common mode noise on data lines.
Audio and video equipment: To suppress common mode noise in audio and video signals and improve sound quality and image quality.
Communication equipment: To suppress common mode noise on communication lines and improve communication quality.
Industrial control equipment: To suppress common mode noise in industrial environments and enhance the reliability of the equipment.
Parameters to consider when choosing an SQ common mode inductor:
Common mode impedance (Zcm): The impedance to common mode signals at a specific frequency, the higher the better.
Differential mode impedance (Zdm): The impedance to differential mode signals, the lower the better.
Rated current (Irated): The maximum DC current the inductor can withstand.
Inductance (L): The inductance value of the inductor, usually referring to the inductance of each winding.
DC resistance (DCR): The DC resistance of the winding, the lower the better.
Operating frequency range: The frequency range within which the inductor can effectively suppress common mode noise.
Size: The physical size of the inductor.
Voltage rating: The maximum voltage the inductor can withstand.
The SQ common mode inductor is a type of common mode inductor that uses a square magnetic core. It features high common mode impedance, low differential mode impedance, high saturation current, and excellent electromagnetic shielding performance. It is widely used in various electronic devices to suppress common mode interference and improve the anti-interference ability and electromagnetic compatibility of the equipment. When choosing an SQ common mode inductor, the appropriate parameters should be selected based on specific application requirements. I hope the above information can help you understand the SQ common mode inductor. If you have any other questions, please feel free to ask.
