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C909Tri-volt Transformer

  • Overview
  • Specifications
  • Reviews
  • Answers
  • Not all transformers are equal. NuTone transformers feature an easy-to-install lock-mount or wall-mount that can reduce installation time by 25%. An additional unique feature is the thermal cut-off switch designed to shut off the door chime system in the event of excessive temperature. NuTone saves you time and money!

    • 8-volt, 20VA or 16-volt, 20VA transformer for use with multiple door chimes in one home; order in standard package of six to help assist with your planning and still retain that economical edge
    • Quick install transformers, built to last so you should have fewer call backs
    • One 8 or 16-volt, 20VA transformer needed for a single chime; multiple transformers needed for two chimes
    • cULus Listed for safety, ensuring you have a quality, reliable transformer that will pass inspection
  • Product Depth (inches)2.015
    Product Height (inches)2.53
    Product Width (inches)1.906
  • Is this a DC transformer?

    Asked by: Zac
    Thank you for your question on the model C909 transformer. The C909 is a tri-volt transformer that has outputs for 8, 16 or 24 volts AC. The current rating for all outputs is 20 voltamps.
    Answered by: NuToneCustomerService
    Date published: 2014-08-11

    C909 Wire Diagram to Hook up Two (2) Chimes ???

    Do I use the 24VAC to hook up Two (2) Chimes ??? One (1) Wire from Each Chime total of Two (2) wires to One (1) side of the 24VAC ??? Then the other Two (2) wires to One C1) Side of the Push Button ??? Should I then Run Two (2) wires from the other side of the Push Button to the Transformer ???
    Asked by: Marine5
    Thank you for your question on the model C909 transformer. All of our door chimes use 16 volts AC. If you use the 24 volt terminals, you will burn out the chime. Connecting two or three chimes together would still use 16 volts AC, you would just need to raise the current level of the transformer to at least 30 voltamps (watts). Please contact the Technical Service Department at 888-336-6151 for further assistance.
    Answered by: NuToneCustomerService
    Date published: 2014-10-02

    Is the tri-volt C909 transformer the correct transformer for a 1940's NuTone 4 chime doorbell with 20V Telechron Synchronous Motor?

    Asked by: Rod
    Thank you for your question regarding the transformer for your door chime. The best way to determine which transformer you need for you chime is to get the model number off of the chime. You can also look at the voltage rating on the current transformer to determine which voltage you will need. If you need further assistance with this issue, please call Nutone Technical Support at 1-888-336-6151.
    Answered by: NuToneCustomerService
    Date published: 2015-05-29

    is this the correct transformer for NuTone 3 chime model LA 70?

    Asked by: caspar
    Thank you for your question on the model C909 transformer and LA70 door chime. The C909 will work fine with the LA70.
    Answered by: NuToneCustomerService
    Date published: 2014-03-11

    how do you wire this transformer for 24 volt front and rear doorbell

    Asked by: henry
    Thank you for your question. To use the C909 as 24 Volts AC, you will need to use the two terminals near the bottom of the transformer marked 24V. There is a wiring diagram on the transformer that states which terminals should be used. For further assistance, contact Technical Support at 888-336-6151.
    Answered by: NuToneCustomerService
    Date published: 2018-05-14
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