4-Channel DC 5V Relay Module High-Low Level Triggering Optocoupler Isolation Load 30A DC 30V AC 250V for PLC Automation Control, Industrial System Control(5V, 4-Channel)

This is a "heavy duty" relay kit. Very solid. 3.2V friendly, this means you can trigger the ON/OFF using a 3.2V IoT device. The High-level trigger works as advertised. I am designing a home thermostat, for the thermostat 24V AC this relay kit is a little too much, still I love it.

Works great. I used this to switch 110 volt lights on and off with a Arduino UNO for a Halloween display, it probably cycled hundreds of times in the course of the evening without a problem.

I used this with my Arduino to make an induction furnace where I needed a big relay for the current I'm drawing through it. It failed at half the current rating.

it works. but the board was poorly soldered. had to clean up quite a few of the joints and give it a good alc bath to remove all the flux residue left behind from the manufacturing process.

works

I ordered wrong part for a project coming up. Then I realized it 12vdc and I meant to order 5vdc. This is a good product and have used their products before. Due to time limits this is the only way I can contact the seller!

Thing is solid so far and easy to implement.Only complaint I have is that the output connectors are a bit small, but still fit 14AWG wire, so not enough to remove a star.

awesome product, i will buy again if i need it