OverviewAll applicationsCategoryDC Filter

DC Filter

Component selectionDesign tips


A DC input filter reduces interference between the device and its DC power supply. That means it prevents noise coupling from the supply line into the device (increasing immunity) and vice versa (decreasing emissions). To filter both common mode and differential mode noise, a common mode choke is supplemented with line filters and capacitors.

If an overvoltage protection is needed, it should be placed at the input of the filter.


Inrush Current for Connectors


Filter Components – Mode of Operation and Selection Criteria