As someone who has dozens of these cheap SSRs, thanks for this. A lot of them don't even have English labels on them. I'll be sure to not use them in any critical situation or something that might be fire-prone.
Tear-down reports indicate that the big problem is way overrated current ratings. Real SSRs start at 5A, which isn't too expensive, and prices go up with the current rating. Fake SSRs start at 25A, and have maybe 10A components inside. Past 10A or so, you have to add a heat sink, which a lot of the fake vendors don't mention.
If you want cheap SSRs, it may be better to order them directly from, say, LIRRD in China.[1] They make solid-state and mechanical relays under their own name, and have UL certification in their own name. There's a minimum order (40 units), but they will send samples. The prices are about as good as the fakes.
If you want cheap SSRs, it may be better to order them directly from, say, LIRRD in China.[1] They make solid-state and mechanical relays under their own name, and have UL certification in their own name. There's a minimum order (40 units), but they will send samples. The prices are about as good as the fakes.
[1] https://www.alibaba.com/product-detail/UL-ROHS-dc-to-ac-sing...