diymore Solid State Relay Module 25A SSR-25DA Input 3-32VDC,Output 24-380VAC

Good item with large base plate heatsink. Being opto coupled there is completely isolation between the control and load circuits. Work very well and I control my installation with USB circuit.

I'm running a modest load, 230V at around 3A, on this and not for long periods and it works very well when being triggered on and off from an ESP8266. From a bit of research on these, allow yourself plenty of headroom, I wouldn't want to be switching more than 10A on this one without a hefty heatsink and probably would go for a higher rated part.

Allows my microcontroller to turn the 240v garage lights on and off

Used alongside a Tasmota flashed Sonoff switch, to control a 3KW heating element in a hot water tank/immersion. Gets quite warm so fitted to a metal box/enclosure to both secure it away from being touched and to act as a heat sink. Works well and allows me to use data from my inverter via Home Assistant or Node Red, to control the immersion and so avoid exporting excess solar, it is now dumped to the immersion when when water is cool. Fitted with the Sonoff THR3 series (THR316 in my case) and able to monitor hot water tank temp too.

Used to turn on 1kw heater remotely using a microcontroller. This is switching around 4A and no issues so far.

Bought it as replacement for FIR sauna relay. Local agent charged me £48 for an item that didn't work and took a week to deliver. This one arrived in less than 24hrs and works perfectly.

This works but 3.3Volt isn't enough to turn on. The minimum control voltage is 5Volt.

The first one lasted around 2 months on my CNC router before completely failing despite being used way below its rating The second one seems to be much better - so far