Yeeco30A High Current 12V Contactor relay Switch Power Switch DC power Switching Control Board Control Module electrical relay switches for Cooler Heater Refit Water Heater Control

Worked fine out of the box. Small / compact. Wish the screw terminals were bigger to support a standard lug. On this unit I had to use the smaller lugs (which I had on hand). Because i used this as an interface with my Honeywell Vista 20P, trigger 17 (Programmable Output) for my alarm siren / bell / accessories.... I needed a reply that did not have an optical sensor.... just a straight contact to the relay and low current consumption rating on the coil.The Vista 20P has limited output for trigger 17 (limit to max 100ma).... so I also removed one leg of the small led on the board to not light up. You can add a led on the output of the relay contact if you really need a led to show you when the relay is activated. This saved about 5 ma which reduced my limit on trigger 17 output.What is nice about this is the fact I did not have to spend another $100 bucks for a honeywell add-on power supply that only supported 1.5 Amps, and a honeywell relay board. By connecting the output of trigger 17 to this relay directly, then using a separate battery and power supply to support the Wiper/NO contact loads on the output side.... I am able to run up to 30 Amps if desired .... but really only using about 5 amps at this time for everything.This relay board also has a nice large value capacitor across the coil, and I recall a diode as well... This helps with any spikes from the coil and/or reverse current when the relay disengages.... the spike can effect sensitive item (chips). I had no problems with this replay on my Vista 20P board. I made a plex-glass board for 2 of these relays which fits exactly into the slotted spaces in the Vista 20P box, and mounts perfectly.

These relays are routinely hooked up to motion sensors which activate the relay to fire banks of lighting in corridors of large buildings.

I am a former electrical contractor used to installing substantially larger relays and contactors for controlling 120v loads. Visualizing this piece of equipment in comparison to previous equipment made me hesitant to use this relay to control a 120v water heater in my camper. I tested it before installing it, then tested on a 45 day road trip. It has operated flawlessly. I'm still amazed and would buy it again.

Comes very well packaged and works like a charm. Excellent product!

I used this for a 1500 btu Rigid AC which was a pretty easy install once I figured out the reasoning. I ran. A 12v thermostat to this relay and then to the AC. Instructions would be nice.