/diy/ - Do It Yourself

>>1185335
Are you joking or something? Well, I'll bite.

>those people won't be playing with kilowatts of AC
Kilowatts or not, they need something for switching. And mechanical relays are cheaper.
>But it won't be on any diy project
It was you who wanted to use a 20A relay as an example.
Not that the situation is much different when a Burger wants to control his coffee maker or do something like >>1185261.
>what project do you have in mind that draws this much power but doesn't have space for a 100x50x50mm heatsink
>and at such a low budget that $15 for the ssr and a $5 heat sink have a significant impact?
Pic related or any variation of it, for example. Or anything requiring multiple outputs, capable of switching higher currents if needed. There are plenty of applications where SSRs are just bigger, more expensive, produce more heat and are more vulnerable to random surges without offering any practical benefits.
>for example I'm using that mentioned ssr on the heat bed of a 3d printer at 450W
20A SSR for a 2A load? Yeah, no wonder it doesn't need a heat sink.
Well, that's a reasonable application for an SSR. I wouldn't use a mechanical relay for a small heating controller either. Point being, SSRs have their own advantages and mechanical relays have their own. It is retarded to religiously stick to one or another.