The 5 Best small Doorbell transformers (2023 reviews)

It is important to have the well suited small doorbell transformer. In the following post, we will help you to select the best small doorbell transformers.

Our review process: Show/Hide

Our Top Picks:

Best Overall: Buy: VIIVRIA small Doorbell Transformer READ REVIEW

Best Runner up: Buy: Maxdot small Doorbell Transformer READ REVIEW

Best For HVAC: Buy: Maxdot Volt Transformer READ REVIEW

Best For An Old Transformer: Buy: Newhouse hardware small Doorbell Transformer READ REVIEW

Best For Wired Power: Buy: Xiaohudui small Doorbell Transformer READ REVIEW

Best Overall: VIIVRIA small Doorbell Transformer

Buy on Amazon

The transformer is a must have accessory for your daily purpose. This is a transformer, transforming 120 volts from house current down to 24 volts. It can be continuously charging your device without the worry of taking of the doorbells or thermostats. It works with a "Honeywell home wi-fi 7-day programmable thermostat (rth6580wf), requires c wire, and works with alexa. It is a permanent power source for the doorbell, not a charger.

This allows you to easily plug it into an electrical outlet inside or outside your house. The tinned ends screwed right into the back of the unit and it runs just warm. It is tight in the outlet so it won’t work it’s way unplugged over time. It works to make your battery redundant.

• Very long cord ensures you can reach a power source
• Plenty long cord and nicely tinned ends made it easy to install
• Great for old furnaces that do not have a c wire

Best Runner up: Maxdot small Doorbell Transformer

Buy on Amazon

The maxdot small doorbell transformer is capable of outshining several other transformer featured in this list in overall features. This product can charge a single Ring Video Doorbell Pro. It works for the Nest both front and back. It is perfectly and works great. It is suitable for a video door bell application. If you install this one, it will save you the option or step of replacing the transformer later on to accommodate the Ring Video Doorbell Pro.

This fit in the old school chime box and has more than enough power. It is easy to install, less than 10 minutes. The FUSE is needed for safety because of the thin wire gauge used for the mechanical chimes and LONG WIRE runs to the new Cam Door Bells.

• Easy to install to upgrade for ring
• Works well, no hum at all
• New and hot release

Best For HVAC: Maxdot Volt Transformer

Buy on Amazon

If you often find yourself scrambling for convenient and suitable transformer, maxdot volt transformer is your end point. The Nest connector keeps the voltage safe so there are no worries for the door chime. It allows you to use both the ring and your existing doorbell chime. It is 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.

The bell wire is standard for doorbells and thermostats. It is great to power an hvac damper actuator. If you are using it for Video doorbell or security camera, it should be sufficient. It comes with any electrical work, only replace it if you know what you're doing.

• Works perfectly for a ring doorbell
• Perfect solution for thermostat and doorbell
• Drives the door bell and ring pro without issues
• Colour-coded wires makes it super easy

Best For An Old Transformer: Newhouse hardware small Doorbell Transformer

Buy on Amazon

If you often find yourself scrambling for appropriate and satisfactory transformer, newhouse hardware small doorbell transformer should be your first option for buying. It is great with the UniFi Protect G4 Doorbell. It has the proper round through hole threaded mount as well, not that weird screw side mount thing. If you were to hook it to 240v, the transformer will likely output Double the 24v or 48v which may toast your doorbell. This is required if you are adding a ring doorbell pro.

This works good, is relatively easy to install (let's say what wasn't old and rigged wiring), and works great. This is a very well made unit. It is a perfect fit and contractor installed with ease.

• Meets power requirements for most doorbell cameras
• Inexpensive and gets the job done
• Good for old systems with just a bell ring
• Easy install if you're comfortable working inside the panel

Best For Wired Power: Xiaohudui small Doorbell Transformer

Buy on Amazon

The xiaohudui small doorbell transformer's material feels more premium than its price would suggest. This adapter is a perfect alternative to having existing wiring. They also have terminals on the back of them so that they can be hardwired to existing doorbell wiring or a 24volt AC power supply. There is plenty of wire in case you have to feed it around walls, baseboard, etc. It will run as hardwired. It keeps you from installing a whole doorbell system.

The build quality of this adapter is impressive, and it is durable enough to withstand significant wear and tear. It will be charged all the time by the power adapter. It is also small enough that another adapter or electric plug can be placed on the same wall outlet.

• Works great with the ring door bell system
• Runs a video doorbell perfectly, exactly what the instructions call for power wise
• Works perfect for the ring pro
• Perfect for ring video doorbell wired