Common Mode Chokes

What is a Common Mode Choke?

The common mode choke is an inductive component used in electronic circuits to block high frequency “noise” caused by alternating current (AC) in a circuit while allowing lower frequencies, or direct current (DC), to pass through. The objective of the common mode choke is to attenuate this unwanted noise, and prevent it from being transmitted into more sensitive circuits. By blocking the high frequency noise and allowing the desired DC or low frequency signal to pass through, the common mode choke eliminates potential malfunctions in electronics devices.

Common Mode Choke Applications. 

There are several applications where you can use a common mode choke to reduce noise, such as LCD panels, Power cables, USB drives, Computers, and laptops Monitors, and automotive power supplies.

At Premo Group, we focus on the design and manufacture of different Common Mode chokes for Automotive applications such as both EV/PHEV AC/DC onboard battery chargers, and HV/LV DC/DC converters.

Common Mode Choke

How to select Common Mode Choke for power supply?

When selecting the right common mode choke, some considerations must be understood. Here we will review the main electrical specifications to take in mind when choosing the Common Mode Choke, more specifically for automotive applications.

  • - Impedance
  • - Frequency range for attenuation
  • - Peak Current
  • - DC Resistance at 25ºC
  • - Dielectric strength
  • - Common Mode choke Leakage Inductance

Premo Common Mode Choke Catalog.

You can find a wide range of EMI-AC & output-DC filters with CM & DM Chokes (iron powder, high permeability ferrite or nanocrystalline cores), that are fully AEC-Q200 qualified in the PREMO catalog.

Common Mode Choke designed and manufactured by Premo Group

Below are some of the standard common mode chokes for automotive applications developed by Premo Group:

Go to any of the above series to buy Premo’s Common Mode Chokes online, and to see the features, and electric specifications for each.

Custom common mode choke solutions.

If you didn’t find exactly what you needed above, Premo offers custom common mode choke solutions to fit your system requirements. Contact our experts and we will help you to reach your project goals with a custom solution. Contact us here.