Tri-Volt, Multi-Volt Wired Doorbell Transformer Ideal with Three Different Voltages Available


This tri-voltage model transformer is great for its versatility. Manufactured by Thomas and Betts, it’s available on our site for a great price.

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This wired doorbell transformer may be used as an 8V, 16V, or 24V transformer.  Manufactured by Carlon, a Thomas and Betts company, this transformer will power up to two low-voltage devices; 10VA(watts) for 8 and 16 volts, and a secondary 20VA(watts) at 24 volts.

The Ideal Transformer to Power Two Chimes, Bells, or Buzzers on the Same Transformer.

Small and compact, this product is durable and packs a punch.  The versatility enables contractors to use it in a variety of situations.  Rather than stocking three different voltages of transformers, stock this one and use the setting you need.

Clamp-on style makes mounting easy.  Mount the outer bracket, wire it, and snap it back in the mounting bracket.

  • Used to power low voltage products, specifically doorbells and door chimes
  • Input 120VAC
  • Output 10VA at 8 Volt and 16 Vols; 20VA at 24 Volt
  • Dimensions are: 2”W x 2.5”H x 2.25′”D
  • Two-year manufacturer warranty
  • Manufactured by Thomas and Betts




No Of Doorbells To Power

Up to 2 Doorbells

Transformer Voltage

16V, 24V, 8V, Tri Voltage (8V/16V/24V)

Transformer VA

10VA, 20VA

Volt amps

10VA, 20VA


1 Year

Customer Reviews

Based on 1 review
T.M. (Newington, US)
Door bell install.

I was happy to Receive the package in a few days, fast shipping, unfortunately one **** on the button was stripped so I re threaded it a size bigger and used a larger ****. The rest of the install went well. The bell rang 4 or 5 times and then failed to ring. I checked for voltage at the bell and all was well there. found the contact in the bell in need of adjustment. I bent the arm base a wee bit to give the points better contact and it seems to be ok.

Thank you for taking the time to leave a review for our Tri-Volt, Multi-Volt Wired Doorbell Transformer. We apologize for the inconvenience you experienced with the stripped screw and the need for adjustment with the contact in the bell. We appreciate your feedback and will make sure to address these issues with our product development team. We are glad to hear that the rest of the installation went well and we hope the larger screw and adjustment has resolved the ringing issue. If you encounter any further problems, please do not hesitate to reach out to our customer service team.