Alinan 2pcs SSR-40DD Solid State Relay DC to DC Input 3-32VDC Output 5-200VDC Single Phase Solid State Relay

It was good except the customer split my order. I needed 4 next day , which they advised but only 2 shipped next day and the other 2 followed a day later. Cost me a second trip by the electrician

I bought the 100A version. Definitely not 100A. I installed it on a large piece of aluminum and added a high speed fan. I needed this relay to power only 50-60A so it was pretty much at 60% of its rated power and within 3 minutes it started smoking really bad and the sticker came off from excessive heat. I remember buying elsewhere a 25A version and it had a 16A mosfet inside. The 40A version also had a 25A mosfet . I also bought a 60A version elsewhere and it only had the sticker changed and, guess what, a 25A mosfet. I didn't disassemble this relay because some cunning Chinese soaked it in black epoxy, but judging from my experience (and the thin legs) it's also going to be a 25A mosfet inside, overpowered 4 times. A good solid state relay of 100A should have around 4-6 mosfets inside. That way they are efficient and do not overheat too much. This relay had only one small mosfet and as I was passing 60A through it, I was probably burning another 20A as heat. Piece of garbage. Even in one of the photos they tell you to put a heatsink at 10% of its rating, this is a freaking joke and a scam.

Works good but should come with terminal cover

The first one I used I set up with a low voltage signal (esp32) to trigger, that worked fine, and a 20v DC battery on the normally open/output side. Switched it on/off a few times, worked initially, then the relay failed within 60 seconds - circuit got stuck closed and the relay stopped responding to the input signals (LED light no longer lights when being signaled).

I wanted to use these SSRs for a couple of 200W water heaters, they failed within 5 min. how do I contact the seller for a refund?