RC840T-240 On/Off Switching Electric Heating Relay with Built-in 24 V Transformer, Black

Works great, used one thermostat to trigger 2 of baseboard resistance 8 foot length in big common room

Mr. Fore here- great product. Replaces any 24v controlled (typical thermostats) 220v electric baseboard heaters (or any electric device that is thermostat controlled). Perfect replacement part. Good wiring diagram on the front of the box. Easy install. This is my second order and both are going strong. A bonus- you can see when the thermostat is triggered, so you can test the whole circuit easily.

Works well!

I installed this Aube Technologies RC840T-240 Electric Heating Relay with Emerson Sensi Wi-Fi Smart Thermostat to control the Enerjoy radiant heating panels in the main living area of our home. I placed the Aube relay in a metal junction box just below the main service panel in my garage. For the 24 volt wiring I connected the Sensi Thermostat to the Aube relay using 18-5 thermostat wire as follows: Blue wire: C terminal of the Aube to C terminal of the Sensi Red wire: R terminal of the Aube to RH terminal of the Sensi White wire: W terminal of the Aube to W/E terminal of the Sensi For the 240 volt wiring: Using 12-2 romex I colored the white wire red with a marker (as is my usual method for 240 volt wiring that does not need any 120 volt application.) Red line-in wire connected to the black wire of the Aube Black line-in wire connected to the blue wire of the Aube and the black line-out wire Red wire of the Aube connected to the red line-out wire The system works just as I had hoped and it is great to have the capability to control the heating panels while away from home as well as having all the features of a smart thermostat. I installed the Enerjoy panels 25 years ago and they have proved to be a very efficient heating system with zero maintenance required in those 25 years, and I’m thrilled to now have the capability of controlling them remotely when we’ve travelling.

So, first up a couple of things to bear in mind 1. I'm based in the UK 2. As a result, mains voltage here is 230-240vac at 50hz 3. So it stands to reason that all items i will be controlling and the supply to this relay/transformer/switch will also be that configuration of 230-240vac and 50hz Secondly, the relay/transformer/switch works flawlessly for my needs. So, why the odd title you ask, well, purchasing such an item from the USA was obviously an odd choice, however a financially beneficial one for myself, put bluntly, it was cheaper, even taking into account shipping and additional tax applied to the price, it was just a better deal than buying through amazon.co.uk Obviously there were warnings from Amazon.com (usa) because it's designed operating voltage does not match the mains voltage specifications there in the US I have pictured the item i received, and as you can clearly see, it says "Load (Res) 208-240v /22A 60Hz" yet the images used to sell the item clearly show "50 / 60Hz" Now, remember that my supply and equipment is all 230-240vac 50Hz, and there was at least one warning regarding the voltage not matching US supply, the images are inaccurate in relation to the Hz rating, which is disappointing. In reality, it appears the unit itself works quite happily at 230-240vac 50Hz outputting bang on 24vac, and the Resistive Load rating of 22A is somewhere in the region of 3 times more than I need is not of a concern to me that the 22A may not be accurate given i use 50Hz and that rating was specified at 60Hz, like i said, just a little disappointing. Value wise, i marked 3 stars, it's solidly built, has good gauge cables but is just expensive for what it is, and also very shortly after purchasing, it went down in price (more than just exchange rate related.)

Installed to control Comfort Zone 5K heater with a Honeywell Wi-Fi Thermostat. Worked great. Easy to install. Has light so you know when it is triggered. Seems well made. Little pricey, but worth it for the convenience. Have a heater installed in a shed. Don’t need the heater to run all the time. So I wanted to add a thermostat I could turn on/off with phone and have it warm in there when I needed to be in there.

Works perfectly with a Honeywell T10 Plus thermostat but the listing is misleading. Specs on the listing say that the contacts are rated at 8 amps (big problem with a 2000 watt heater) but states 22 amps on the device. I trusted what was stated on the device and it's working fine. Another nice feature, which was stated in another review, is that you can see when the thermostat is tripping the relay, as it has a visible red LED. Provided pic is NOT the final install. Just wanted to get it "working" before I dressed everything up.

Electric Baseboard thermostats are not accurate with very wide swings between heat on and heat off. This device allows the use of a low voltage accurate thermostat, smart thermostat, or wifi thermostat. I use this for a sun porch that needs additional heat during very cold weather. This thing works GREAT, controls heat to 1 degree from setpoint, and does not need batteries unless you need to see the room temperature when power is off. It was easy to install but I have an electrical background. If you know nothing about electrical wiring I would recommend hiring an electrician or find a friend or neighbor with electrical wiring experience.