16.5V 40VA Door Bell Transformers Security – Compatible with Ring Video Doorbell Pro 40TR, Wired Chimes, Nest, Sensi, DSC – Easy Install w/Screw Terminals & Auto-Resetting Fuse, by CENTROPOWER
Price: $21.99 - $17.59
(as of Nov 24, 2025 22:14:53 UTC – Details)
Product description
16.5V 40VA AC Plug-in Transformer for Doorbell & Security – Compatible with Ring
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. 16.5V 40VA Plug-in Transformer Doorbell AC Power Merchant Video
High voltage protection: when high voltage occurs,the surge protection will be hit through to protect the connected device.Over Current protection: when over current occurs, the power supply will automatically switch to self-protection status, when condition removed, then switch back to normal
Doorbell System Transformer,Power for Multiple Doorbells .
Passed UL Listed,stable power supply with overload protection,quality and safety are guaranteed.
Our adapter can continuously provide power to your doorbell or thermostat to improve the situation of low battery or power voltage deficit.
AC to AC Power Supply
Input 120V AC to 16.5V AC Output Power Adapter,LED green power indicator
Easy to install: Output with screw terminals, simple wiring，Low interference，Built-in resettable PTC fuse.
The AC 16.5v power adapter can be used at home for doorbells and thermometers?
Yes, of course you can, for this adapter, this is its most basic function. However, when using it, please note that the required input voltage of the doorbell matches the adapter.
I have two different brands of doorbells, is it compatible?
Check whether the voltage required by the doorbell matches that of the adapter. If the voltages match, they are compatible.
Is the adapter UL listed or ETL certified, I’m very focused on its safety.
I understand your need very well, this 16.5v 40va adapter is UL listed, you can use it with confidence.
Can it be used with the simplisafe visual doorbell?
Yes, the main voltage required for your doorbell is 16.5V to be compatible.
Will this Work With Vivitar db265 Video Doorbell?
You need to look at the voltage required by the doorbell. If the voltage used by your doorbell is 16.5v, it can match the adapter.
Package Dimensions : 4.25 x 3.11 x 2.8 inches; 1.59 Pounds
Item model number : AC-16.5V
Date First Available : September 6, 2024
Manufacturer : CENTRO
ASIN : B0DB8C8R7F
Best Sellers Rank: #13,976 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #8 in Door Bell Transformers
Customer Reviews: 4.6 4.6 out of 5 stars 165 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Upgrade with Confidence: This UL conform 16.5V 40VA plug in transformer replaces and upgrades underpowered transformers, offering steady and reliable power to your doorbells and burglar alarm systems
Hassle-Free Installation: With screw terminals and simple wiring, you can easily replace your old transformer with this CentroPower transformer, which fits Honeywell and Sensi smart thermostats and other devices requiring constant 16.5V power
Safe and Stable Design: Equipped with an auto-resetting (PTC) fused secondary and an LED green power indicator, this transformer provides safe and stable power, ensuring uninterrupted operation of your doorbells and burglar alarm systems
Compatibility Guaranteed: This transformer is compatible with Honeywell Ademco, DSC, ETC burglar alarm systems, as well as Video Doorbell, Video Doorbell 2, Video Doorbell Pro, Nest Skybell Doorbell, and more. Note that the brands mentioned are only for demonstrating compatibility
Accurate and Reliable Output: With no-load voltage testing of about 18.5-19.5V, you can use an AC voltmeter or multimeter to test the accurate voltage output data of this 16.5V 40VA plug in transformer, which won’t affect its normal function
Customers say
Customers find the transformer works well, with one mentioning it powers an old doorbell chime, and they appreciate its easy installation. The quality and fit receive mixed feedback, with some saying it looks well-made while others express concerns. Power level is also mixed, with several customers reporting insufficient power.
