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24V 40VA Doorbell Transformer - Heavy-Duty Copper Core for Ring Pro/2 & Nest Hello, Easy Install Hardwired Power Supply, Thermostat/Chime Compatible

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This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026

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Availability: Only 10 left in stock, order soon!
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Arrives Monday, Dec 15
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Features

  • Universal Compatibility - Certified for Ring Video Doorbell Pro/2, Nest Hello, Wyze, Eufy & most 16-24V smart doorbells. Includes dual-input terminals for thermostats/chime
  • Zero Voltage Drop & Anti-Overheat - Patented copper-core design maintains stable 24V output even under 40VA max load, eliminating "low voltage warnings" and extending doorbell lifespan by 3X
  • Power Multiple Thermostats/Doorbells - Replace and upgrade underpowered transformers with this 24V AC Transformer, while providing ample power to single or multiple thermostats and doorbells(Perfect replacement for an old transformer and will work with any wired door chime)
  • Easy to Install - The doorbell transformer is easy to replace and install with screws, unscrews or threaded clips to the electrical box, in a safe place
  • Trusted Brand Expertise - VIIVRIA has been specializing in digital accessories for years, consistently delivering high-quality products and services. We are committed to providing reliable, durable solutions for modern homes, with a focus on customer satisfaction and product performance

Description

VIIVRIA 24V Transformer is specifically designed to optimize the performance of Nest, Ecobee, Honeywell and Sensi smart thermostats; Also compatible with Ring, Eufy Video Doorbell, Ring Video Doorbell 2, Ring Video Doorbell Pro, Nest Skybell Doorbell, and other devices that require constant 24 volt power for operation 24V/40VA Thermostat and Doorbell Transformer, Power Supply Compatible with Nest, Ecobee, Sensi and Honeywell Thermostat, Nest Hello Doorbell and All Versions of Ring Doorbell (4011MT) Powers thermostats and doorbells: replace underpowered transformers Easy to install: screw down and thread clamps to electrical box Input is 120 VAC, 60 Hz; Output: 24 V/ 40 VA This 24v transformer fits for Nest, Ecobee, Honeywell and Sensi smart thermostats; Also compatible with Ring Video Doorbell, Ring Video Doorbell 2, Ring Video Doorbell Pro, Nest Skybell Doorbell, and other devices that require constant 24 volt power for operation. About VIIVRIA: VIIVRIA specializes in high-quality digital accessories, delivering reliable products for modern homes. We focus on providing durable solutions and exceptional customer service, ensuring satisfaction with every purchase.

Brand: VIIVRIA


Power Source: Corded Electric


Product Dimensions: 2"D x 2"W x 3"H


Mounting Type: Wall Mount


Current Rating: 0.5 Amps


Product Dimensions ‏ : ‎ 3.54 x 2.44 x 1.89 inches; 1.57 Pounds


Item model number ‏ :


Date First Available ‏ : ‎ April 1, 2019


Manufacturer ‏ : ‎ ZKRFID


Best Sellers Rank: #10,405 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #8 in Door Bell Transformers


#8 in Door Bell Transformers:


Customer Reviews: 4.4 4.4 out of 5 stars (895)


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Dec 15

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.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Build quality good, perfect for heating system thermostat or doorbell, excellent mounting options
This was a replacement for my multi-zone boiler. It came with everything needed for a professional install. The transformer can be mounted in a steel box with a 1/2 knockout hole or it has the option to mount it with the included 4 bolt pad. I chose a metal box with a cover that had a 1/2 knockout and simply installed the transformer to the plate and tightened with included nut which made for a great tool free install. They really should provide a pic of the optional mount on back side. Wiring is of decent quality a gauge and should provide many years of service. My system uses zone motors to control heat and it handles the load with ease. If you are looking to use this for doorbell solution it would handle the task easily. his was less than half the cost of the same rated unit at the big box stores and greater mounting options. With Amazons fast shipping I never left the house and saved time and fuel running to the stores. Would definitely recommend this transformer for any needs requiring the rated specs. ... show more
Reviewed in the United States on April 11, 2024 by Mike M

  • Compatible with August door bell camera
I bought this to replace a transformer that was starting to fail. I’m using it with an August smart doorbell that kept losing WiFi connection anytime the voltage dropped below 12v. Since I installed the transformer, it hasn’t lost WiFi once. The mounting was identical to the transformer I replaced so it’s a great fit. The description doesn’t indicate it works with August so I was apprehensive at first but it works just fine. ... show more
Reviewed in the United States on October 23, 2025 by Jack

  • Great item and easy to install
Great item
Reviewed in the United States on November 13, 2025 by Angel Simon

  • Failed transformer for video doorbell application
Product marketed to support video doorbell application. Two of these purchased; both failed to support Reolink video doorbell. Instead, they failed to support the doorbells. I request a refund for both. Took an alternate route, and now have two working Reolink vide doorbells. -GH
Reviewed in the United States on November 11, 2025 by Gerritt Holgerson

  • This product works great.
It is easy to install, and it works great.
Reviewed in the United States on October 16, 2025 by Amazon Customer

  • works with nest battery bell
I installed this so I didn't have to charge my nest battery door bell. It was easy to install. time will tell how long it will last.
Reviewed in the United States on December 9, 2024 by AA

  • Perfect fix
My wired Ring video door bell quit allowing the chime to function. This 24V 40VA transformer now makes it work perfectly.
Reviewed in the United States on October 14, 2025 by Anthony M Messina

  • If your ring is not working with your doorbell this is what you need
This is what you need if when you install the ring doorbell and it does not work. It gives you the voltage and power supply you need it is quality built and fit perfect in the doorbell ringer box
Reviewed in the United States on October 21, 2025 by Lisa Passero

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