Yes, strongly advise against using SC1 for typical switches. The problem is, they us tiny TRIACs to control the outputs. I just got done repairing 2 for the second time that a user overloaded the outputs and blew the tiny TRIACs to pieces.
The SC-2 has high current relays.
Forum sponsor Trainz typically has tons of both. Heck, I just counted, I saw 3 under $50 and 3 more under $60 for used SC-2s.