Jump to content

Dc Contactor.


Recommended Posts


there is no a fix ratio between AC perfomances and DC performances.

AC ratings for a certain contactor are always better that DC ratings.


In some cases the differences are big, in other cases differences are not so big.


You have to ask the contactor manufacturer, specifying the type of load (inductive, resistive, etc.)




Mario Maggi - Italy - http://www.evlist.it - https://www.axu.it

Link to comment
Share on other sites

Hello Chris


The limitation is the ability for the contacts to extinguish an arc when the contactor opens.

In the case of AC current, the current must go through zero at twice the line frequency and this will help to extinguish any arc that remains.

With DC, there is no zero current and so the arc can continue for a long period unless there is some arc extinguishing features of the contactor. This is why there is a very large difference between contactors and their DC ratings.


Best regards,

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...