Re: AC CONTACTORS USING DC VOLTS
If you are concerned with the power contacts, the answer is:
There should be no problem with closing on and carrying the DC voltage and current. however, breaking the load may be difficult if not impossible. The air gap of the open contacts may not be suffcient enough to break the DC arc.
You would need to confirm the DC ratings with the manufacturer. Many DC ratings are not published in general catalogs but they are available from the manufacturer. UL has only recently begun testing general purpose contactors for DC applications, but they have tested relay (power and control) contacts for years.