After reading the previous reviews I had doubts about ordering this device. However, it works as intended. (Note that this is not a long-term report.) I'm using it as an AC motor speed controller and it works for the initial tests. I had thermal paste between the relay and heatsink. There was NO terminal cover with me (- 2 stars deduction). Before connecting the power supply I removed the block from the heatsink, wiped off the thermal paste and washed the paint off the heatsink. I haven't read anything about thermal paste that works through paint. I applied thermal paste and attached the solid state relay to the heatsink.
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