Hello: If one wants to remotely turn a 48VDC, 10A inductive load on and off using a logic level control signal (as opposed to putting a switch in series with the load) is it permissible to use a solid state relay as opposed to a contactor? For that matter, from a regulatory point of view , what does a contactor do that a solid state relay doesn't? Forgive me if this question sounds naive, but I have been unable to track down the answer in any of the books on my desk. Thank you Madhu -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu