Im just trying to figure out how I would actually make the inside mount work externally and I cant think of any way... Im really curious though... I found a good deal on a in box large heat sink and a ssr for less than 20 bucks...Do you absolutely need a fan with these internal mounted Sinks? I can't imagine these things getting so hot they fry especially if you reach your desired temperature fast so you aren't running them wide open... Anyone using these in box without a fan and having issues?
It might be possible to run an internal heatsink without a fan, but I wouldn't do it. SSR's can dissipate up to about 35W when in conducting mode. I once had a 15W soldering iron, and it could get up to about 440˚F! In a plastic box I wouldn't do it without air inlet and exhaust openings in the box, the fan sealed over the air inlet, and blowing directly over the heatsink fins.
Brew on