Just got 36 25A solid state relays on ebay for $74. Great deal. Merry Christmas to me. 
Now what to do with them? :-/
Nice price. Keep in mind to utilize the maximum 25 amp current rating requires quite the heatsink, that's why they have smooth metal backings.
Lefty
Really! During a stress test of my 2000F Degree Kiln, I managed to produce an amazing amount if heat in the SSR while tuning PID parameters. (all within spec... but right to the SSR limit) Yes, I had a large heat sink. It was HOT.
Just got 36 25A solid state relays on ebay for $74. Great deal. Merry Christmas to me. Now what to do with them?
Heh - I'm kinda in the same boat; a couple of weekends ago I went to a local hamfest and bought a large heatsink with 16 25A SSRs mounted on them (each with a varistor across the outputs) in a 4x4 pattern. Got it for $35.00; have no clue what I'll do with them (but I couldn't pass up the deal!)...
;D
DIY nuclear reactor?
To power lasers!
A nuclear reactor to power lasers. I like it!!!! Now where did I put that plutonium?
I would surely like to find some that did NOT have automatic zero-crossing switching.
Well all scr/triac based SSR are going to be zero-crossing switching from on to off state as that is the only way to turn off a triggered and conducting scr. However the the turn-on can be either random or zero based I guess on the design of the triggering circuit of the device. Not sure if it is always clearly stated in many SSR datasheets or not what the turn-on charactristic are of the device. I would assume that lots of high power random switching would generate a lot of harmonic garbage in the local power wiring?
Lefty
The flat metal on SSRs, is it just for heatsinks and is it usually isolated. Got a plug socket to modify 
The flat metal on SSRs, is it just for heatsinks and is it usually isolated.
Yes to both. Use heatsink paste for best results.
But the 0.1% of us wanting to do phase-angle dimming need the kind WITHOUT the zero-crossing circuitry.
Is this what you are looking for?:
http://www.alliedelec.com/search/productdetail.aspx?SKU=6820149
I am interested in making a phase-angle controller for a split-phase motor, so I would like to know more about this.