this is another page of data sheet.
this has application hints.
That's not the datasheet for a real Fotek SSR. It's the datasheet for a very dangerous fake Fotek SSR.
When buying Fotek solid state relays, a great deal of care must be taken to ensure that you're getting a 'real' one. The fakes cannot handle the rated current and have been known to burst into flames.
On eBay a while ago, I actually found more fake Fotek SSRs than real ones. Specifically, the Fotek-25DA and Fotek-40DA
Here are a couple of links that 'CodingBadly' posted in another thread a couple of months ago:-https://www.google.com/search?q=fake%20fotek%20ssrhttp://canada.ul.com/safetyalerts/ul-warns-of-solid-state-relay-with-counterfeit-ul-recognition-mark-release-13pn-52/
And from that same thread:-
..dont leave that (Fotek) SSR unattended. I used one for a 220V, 1500W heater - it burned after a month.
And it appears that some of the fakes are even harder to distinguish than the ones in the links. The fakes used to be labelled "Solid State Relay" whereas the real ones said "Solid State Module", but now the fakes have been corrected to say "Solid State Module" too.
Here's a photo. The one on the left is a fake:-