Any of the output options work...because they all have a relay. Looks like 1 has 2 relays, 1 has a dc pulse + relay, 1 has a 4-20mA signal. Probably get the 2 relay unless you need the pulse or current.
Yes, it runs on 100-240 VAC 50/60 Hz. US Houshold wall socket is 120 VAC 60hz, so it will work fine.
I don't have a SSR to recommend. 12A is getting fairly large, but I'm sure there is something. A heater is a resistive load, which helps.
What are you building?