I did not look for a datasheet, but I read the reviews of this product on the DX site, and I found this:
sacamantecas Post on 2013-01-17
Involvement:Expert (understands the inner workings) - Ownership:more than 1 month
Much better than a mechanical relay, because it works quickly (<10 milliseconds), silently and for too many years. SSR requires <12mA (an Crydom CX240DX relay requires 12,5mA) There are a LED indicator: this is a good idea
With this SSR you can turn on-off a big amount of power: 5500W at 220VAC. In my house I haven't enoug power :-D
You can connect 4 SSR to an arduino or compatible microcontroller. This is an ideal gadget for domotic and industry applications: you must buy a SSR now!
The other reviews are all very positive, so I would give it a go.
About the way to connect the relay to the core, I decided not to advice on sinking since the sourcing capacity is more than enough. Another reason not to choose a sinking setup is that indeed, induces negative logic, unnatural for most starting hackers, no offence @jburdy!
Further more most SSR’s usely have a built in current limiting resistor, to enable a wide control voltage range of 3-24 volts or so. The reason is that these units have to be rocksolid and deployable in all kind of situations by every day service engineers.
Sourcing the relay, instead of sinking, is the simplest way, and it guarantees that the relay is not accidentally activated on power cycles or reset after code flashing. I think this is important because @jburdy wants to switch a lot of high voltage current. And we don’t want him to get electrocuted during testing
That’s why I suggested this setup, cheap, simple and safe!