CG Solid State Relay SSR-40DA DC to AC Input 3-32VDC to Output 24-480VAC 40A Single Phase Plastic Cover…

Good SSR for a good price. Been using for a couple months now with zero issues. I'm using the 40A model for only ~6 amps, 120V, which could be why lol. But the higher amperage models aren't much more expensive anyway. Haven't noticed any heat buildup or noise. Super easy to get set up with fork connectors, and the input switching supply needs only be a couple dozen milliamps.

Be sure to mount these to a heat sink or metal surface for cooling. Our old one burned out because the mounting screws rusted off and the unit overheated.

I bought this since it was reasonably priced and shipped overnight, and I needed it for a custom project with a tight timeline. It is overrated for my circuit, which only draws up to 2 amps, but I still mounted it to a quality heatsink. I may pull it for a different project some day so the extra capacity is nice to have. Used in a cooling circuit with a 12V control voltage that cycles the SSR multiple times an hour. Has been working just fine for weeks and I expect it will continue to do so.

I ordered this relay for a project. All wired up. Red light came on. Tested continuity with Fluke ohm meter. No continuity. Sent back. Replaced quickly. (Great service). Same result. No continuity. Happened that our adult son was with me, and advised me to put a load across the NO contacts. Worked perfectly. So I returned the first relay for no good reason. But in the product description I cannot find anything about a minimum load in order for the relay to work. Works very well in my project. Service on return was excellent. Would be much better to have an explanation about needing at least a minimum load.

So far works as it should for my purpose. Will see if it holds up, using it in my smoker.

I purchased a couple of these to use as a replacement for the original relay controlling the compressor in a window AC unit which had developed an intermittent "contacts closed when coil deenergized" condition. At the cost of these solid state relays, it doesn't make sense to retain the "old tech" of an electro-mechanical relay when you can gain all of the benefits of a solid state device. Longevity is uncertain at this point, but I will be surprised if I ever have to replace it again, since I selected a new relay with double the load current rating due to the inductive load of the compressor.

This SSR performs well under load and has been reliable in my temperature control system. It switches cleanly without noise or spark, just as expected from a solid state relay. The build feels sturdy, and the included thermal grease is a nice bonus to help with heat dissipation. I paired it with a heatsink for better performance and haven’t had any overheating issues. The the plastic cover feels a bit flimsy and might not hold up in rougher environments. Still, for most DIY or light industrial applications, this is a solid and dependable choice.

Great value, easy to install.

Worked perfectly to fix my heat press! Easy to install.