Recommended · for some experience
Teardown of an eBay 25A Solid State Relay. (SSR)
Why people recommend it
Big Clive opens a cheap eBay 25A solid state relay and finds a triac rated well below the label; cited when people ask what is inside these SSRs.
Watch for: the internal triac rating compared with the 25A on the case
In their words
See also Big Clive's Teardown of an eBay 25A Solid State Relay (SSR).
Transistor on electronics.stackexchange.com, May 2019. CC BY-SA.
It's definitely a counterfeit, however, so it can only be trusted at up to around 10 amps according to my research (AC counterfeit versions were reviewed well here and here; I'd expect the DC version to have similar results, but I haven't found reviews for the DC version specifically).
weildish on electronics.stackexchange.com, Mar 2018. CC BY-SA.
