Common Mode Chokes

Our standard Common Mode Chokes are available in four surface mount families styles and six through hole style families, listed on the following website pages. Click on the product family that interests you to review a detailed spec sheet, or browse them all. If our standard products do not fit your requirements, contact us to review the wide range of custom sizes and shapes available.

Common Mode Chokes and or Filter Chokes are one of the most effective methods for EMI filtration of power and signal lines. Precision Inc. offers many standard Common Mode Chokes products that meet the demand of typical circuit applications. Precision Inc also understands that quite often a standard product will not meet the requirements of a particular application. Therefore, Precision Inc offers a wide variety of custom options for Common Mode Chokes, providing the very best solution for the circuit applications.

The Common Mode Choke filters the common mode EMI currents without causing signal degradation and without derating under high currents. Precision Inc has designed their standard Common Mode Chokes to work over a wide frequency range and to provide the highest common mode impedance. Stable Common Mode Chokes allow most signals to pass unaffected, yet filter the noise (EMI) from these circuits.

Common Mode Chokes are applied to pairs of conductors the supply path and the return path. Precision Inc standard Common Mode Chokes are effective in filtering supply and return conductors with in-phase signals of equal amplitude. In many applications Common Mode Chokes are coupled with Power Factor Correction (PFC) components.

Precision Inc Common Mode Chokes are designed to meet applications requiring a high DC current bias and are compatible with switch-mode power supply designs.

Precision Inc also offers Differential Mode Inductors for filtering out-of-phase or uneven amplitude signals.

Many IC reference designs use Precision Common Mode Inductors as well as Switchmode Transformers, Current Transformers, Power Factor Correction Inductors and Power Inductors.