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Centro Power 16.5V 40VA Auto-Resetting AC Doorbell Transformer Plug-in 40TR
✅ In stock
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Grade
Analysis Confidence
8%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
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Price verified Sep 25, 2026 4:58 AM · Prices & availability subject to change
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📝 Product Overview
🏪 Sold by
CENTROPOWER
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓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
✓Power Specifications: Features an input voltage of 120 VAC at 60Hz and delivers a consistent output of 16.5V at 40VA, providing reliable power for security systems, smart thermostats, and doorbell applications
✓Easy Wiring Connection: Includes screw-down output terminals and thread clamps that simplify the installation process, allowing for secure and straightforward connection to your devices
⚙️ Specifications
Brand
CENTROPOWER
Power Source
AC
Mounting Type
Wall Mount
Specification Met
UL
Number of Items
1
Brand Name
CENTROPOWER
Model
AC-16.5V
UPC
759126327132
Number of Packs
1
Item Highlight
Equipped w/Screw Terminals. PTC Fuse. Compatible with Ring Video Doorbell Pro, Nest Doorbell, Sensi & DSC Wired Chime Systems
Manufacturer
CENTRO
