SMD Common Mode Chokes SQD

The SQD Series SMD Common Mode Chokes are compact surface-mount EMI suppression components designed to reduce common-mode noise on power and signal lines. This page is dedicated to the SQD series, which has been independently separated from the legacy product range to provide clearer classification and improved application matching on the new Ferrtx website. As a Common Mode Choke SMD solution, the SQD series combines stable electrical performance with space-saving design, making it suitable for modern high-density PCB layouts. What Is Common Mode Choke Operation? Common mode choke operation is based on suppressing unwanted high-frequency noise that appears simultaneously on multiple conductors in the same direction (common-mode noise), while allowing differential signals to pass with minimal loss. In typical operation: Differential currents generate opposing magnetic flux, which cancels out Common-mode noise generates reinforcing magnetic flux, creating high impedance Noise ene…