Search  for anything...
WUYELIN

24 Volt Power Adapter/Transformer,C-Wire Adapter Thermostat，Compatible with All Versions of Ring Doorbell and Thermostat for Ecobee,Sensi and Honeywell(25Ft Cable)

    • Based on 2,842 reviews
Condition: New
Checking for product changes
$14.99 Why this price?

Buy Now, Pay Later

As low as $3 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Feb 9
Order within 15 hours and 8 minutes
Available payment plans shown during checkout

Features

  • HOME USE: Plug the transformer into your standard 120V outlets and converts to 24volt AC current.Please note that the c wire adapter is not compatible with the Nest learning 3rd generation
  • SUPPORTED DEVICES: The 24v power adapter can not only power for popular smart thermostats such as for Honeywell, for Ecobee, for Emerson , for Sensi, but also can convert to 24 volt AC current for other devices that require 24v current for operation
  • TECHNICAL SPECIFICATIONS: input voltage is 120 V AC, 60 Hz; Output voltage is 24 V, 300mA/AC,Directly tested with a multimeter is no-load voltage: AC26.6V-27.5V Note: The brand above is only for demonstrating compatibilityyy
  • INSTALLATION :To prevent no power output, you must ensure that the terminals are stripped and securely clamp the screw terminals into the thermostat to maintain good contact,2pin non-polarity wires to ensure easy and error free installation for installers of all skill levels and knowledge bases,If your wiring is complicated, please ask a professional electrician for help
  • EXTRA LONG CABLE: 7.6M (25ft) long cable enables you to install the cable along the wall and connect to the electrical outlet inside or outside.For Nest E connected this adapter to C and R pins (R also having the HVAC's Red line connected),For Nest Learning Thermostat,3rd generation connected adapter to the Cand RC pins
  • For Nest learning 3rd generation. White wire to C, white/ grey striped wire to same (along with) the red wire to RC,For Nest E connected this adapter to the C and R pins (R also having the HVAC's Red line connected)
  • For Nest learning 3rd generation Y1 (connected to the blue wire) / G (connected to the green wire) / RC (connected to the red wire and the power adapter grey and white wire, RC is to be connected to the 2 with the wire) W1 (connected to the white wire) C (connected to the power adapter white wire) must be satisfied with having the above wiring positions

Description

Attention:To prevent no power output, you must ensure that the terminals are stripped and securely clamp the screw terminals into the thermostat to maintain good contact. personal advice： required to ask the person who understands the electrician to install. Be advised, the initial ends on this wire are treated and if you cut them to shorten it, the copper is tougher to get into the thermostat with pinch vs. screw terminals.Will result in no power output.For Nest E connected this adapter to the C and R pins (R also having the HVAC's Red line connected),For Nest Learning Thermostat,3rd generation connected this adapter to the C and RC pins

Brand: WUYELIN


Power Source: AC


Product Dimensions: 1.8"D x 2.3"W x 2.5"H


Mounting Type: Embedded


Current Rating: 300 Milliamps


Maximum Frequency: ‎60 Hz


Minimum Frequency: ‎60 Hz


Specification Met: ‎FCC


Item Weight: ‎0.03 Pounds


UPC: ‎791265645043


Manufacturer: ‎WUYELIN


Part Number: ‎240030


Item Weight: ‎0.48 ounces


Product Dimensions: ‎2.3 x 1.8 x 2.5 inches


Country of Origin: ‎China


Item model number: ‎MYT240300


Is Discontinued By Manufacturer: ‎No


Color: ‎WHITE


Style: ‎power adapter


Material: ‎Plastic


Shape: ‎Egg Shape


Thickness: ‎2.5 Inches


Voltage: ‎24 Volts


Wattage: ‎7.2 watts


Amperage Capacity: ‎300 Microamps


Maximum Power: ‎7.2 Watts


Installation Method: ‎Wall-Mounted


Item Package Quantity: ‎1


Number Of Pieces: ‎1


Temperature Range: ‎-20℃～+40℃ Degrees Celsius


Plug Format: ‎A- US style


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: December 4, 2018


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Feb 9

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Works great, plenty of wire to install
This works great with a Sensi Lite. I had to run a wire from the thermostat into my basement, and this unit has PLENTY of wire length. You could easily run it from a second story into the basement. It seems decently made and came with some basic instructions as well as a jumper wire if you need it.
Reviewed in the United States on December 7, 2024 by Alec R. Heilmann
    • Great 24 vac power supply!
I used this to power a heat only wireless thermostat on my fireplace. It's perfect and works great!
Reviewed in the United States on December 18, 2024 by james e.
    • Perfect!!
I don't know why people return this, I'm using this with a honeywell T9 and works perfectly, just follow the instructions, it's been working for over a month now without any problems!!
Reviewed in the United States on December 8, 2024 by pimpo
    • Works great over all for the Google Nest
This is a great solution for my Google Nest install. When I initially installed the Nest I used this since I did not have a C-Wire with my original thermostat. Figured this was easier than running a total line. I plugged this into the hallway initially just to test to ensure everything was working and it worked like a charm. After several test I was very impressed. I decided to run the line through the wall and downstairs so I could plug it into a functional outlet in the basement. That however did not work. I tried several plugs in the basement and they all did not work for reasons that at this time are unknown. I took the entire plug back up figuring maybe as I ran the wires I damaged the plug, but I tried one last time to plug it into the hallway where it originally functioned and to my surprise it is working again. I am not sure why plugging this in 10 to 15 feet farther away made it not function but I am just glad the Nest is working as my wife and I love the new abilities compared to our older thermostat. If anyone has any thoughts about the other plugs however I would be very interested to learn what prevented it to function there. Thanks! ... show more
Reviewed in the United States on June 12, 2020 by Walt
    • Saved The Day
Review Image by Dave K Dave K
Super happy with this product. I didn’t have an existing C wire for hooking up my new Wi-Fi smart thermostat. I’ve been wanting one for a long time. It gets hot in my bedroom, and who wants to get out of bed and walk downstairs to adjust the thermostat when you’re trying to sleep? I wasn’t even aware I didn’t have one until I went to install the new thermostat. It’s my first experience wiring up a thermostat, so it was a great learning experience. The C wire is basically a 24v power supply for your newer thermostats. My home is pretty old, it originally had an old style thermostat with a mercury switch. This thing is easy to wire up, it has two wires, you can use either one to send power to the C input and the other one, for me, had to go into RC. Which I assume must be for grounding. The length of the cable was more than adequate for me. Getting the wire to my thermostat wasn’t easy. I have a hole in my wall, the wires run behind the wall and down into the basement where there’s a small hole in the floor boards. I can’t believe I pulled it off, but it actually worked and it didn’t even take long with some help from my daughter. I took some fishing line and connected a lead sinker to the end and poked that through the hole in the wall. It dropped down onto the floor and I had my daughter move it around until I could see it, and grab it with a set of very narrow needle nose pliers. Once I had it into the basement I wrapped up the C wires and zip tied them so the couldn’t come lose and pulled it back up through the wall. It actually worked. I ended up running the wires along the ceiling of my basement and plugging it into an outlet down there against the wall so it can’t accidentally get yanked out of the outlet. Now I can change the temperature of my thermostat without needing to get out of bed. This thing worked perfectly for me, I have only a small amount of experience wiring and I was able to get this done perfectly and safely. The price is fair. Saved the day for me. ... show more
Reviewed in the United States on November 12, 2019 by Dave K Dave K
    • Works, no hassle
Bought one 4 months ago to use with a smart thermostat (after HVAC tech said it would be impossible to use a smart thermostat in with my HVAC and also that an adapter like this didn’t exist) and it has worked flawlessly. Bought a second one to wire a doorbell cam. Used the existing wiring in the wall, works perfectly. Only complaint is the part you plug into the wall is heavy, it stays in place but a slight bump will loosen it. ... show more
Reviewed in the United States on August 11, 2024 by Phil
    • perfect for wifi thermostats that need a C wire
recently changed out my thermostats (7 thermostats at 3 properties) with the Honeywell wifi units. on all but 2 I was able to use existing wiring and get 24V into the back of the thermostats. at my older office building I was not, and with both air handlers in the attic I wasn't too excited about running a new conductor to the HW units. but both of those thermostats are on walls that have a closet on the opposite side, with a 110V outlet available. simply run the adapter wire thru the wall and into the back of the thermostats, in my case connect to the R and C terminals, plug it it and I'm good to go. I will run new low voltage wires next time I upgrade the AC units, but for now the adapter was a quick fix. ... show more
Reviewed in the United States on January 13, 2025 by Craig D

Can't find a product?

Find it on Amazon first, then paste the link below.