Old version of Murray MP-AT (8 years old) was shut down many times and was too sensitive to a particular socket set. Cable box power supplies or power strips were annoying. I confirmed that the devices were not faulty but the switch was receiving ARC errors. I bought this newer MP-AT2 and all the false alarms have stopped. I had the Siemens branded option but wanted to make sure it was compatible with the panel so I chose Murray just to be on the safe side.