I like the Crydom or Opto22 that operate up t0 40a with the 3-32v input.
We used about 50 of them in a check sorter. I ended up with a big box of them.
Bear in mind this is just a triac with a LED optoisolator driving it so you can think of the input as nothing but a LED behind about 500 ohms of resistance. (they draw 5ma@5vdc measured and I am assuming 2.5vd on the LED, maybe not exactly true but a starting place)
You can drive 40a 240VAC directly from a 4000 CMOS gate, pretty cool. I always slip a 2n2222 or similar in there but that is just me.
I have also driven the pick of an SSR directly from 120v using the two capacitor and two diode trick. It worked fine for many years. That is something an old IBM engineer came up with to drive low voltage indicators with from line voltage, Basically you have a capacitor in series with the load and another one across the load for a voltage divider and filter. I added 2 diodes to protect the LED.
