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  • Overview
  • Specifications
  • Reviews
  • Answers
  • Not all transformers are equal – and this one is the most powerful transformer we offer! 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!

    • 16-volt, 30VA transformer for powering 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 16-volt, 30VA transformer powerful enough for up to three chimes saving you installation time
    • cULus Listed for safety, ensuring you have a quality, reliable transformer that will pass inspection
  • cULus ListedYes
    Product Depth (inches)2.54
    Product Height (inches)2.65
    Product Width (inches)2.19
  • C907 is rated 4.5 out of 5 by 2.
    Rated 4 out of 5 by from Why did C907 reduce va when installed My C907 was installed with a ring video doorbell but only worked for about 30 minutes or less. When I checked the VA it only registered 19va, which is not enough to overrate the Ring Video doorbell. i don't know why the NuTone transformer is only outputting 19va? any help would be appreciated...I will call tomorrow... Thanks
    Date published: 2018-02-19
    Rated 5 out of 5 by from Gutsy transformer For the last twenty years, our house has been sufferring from a weak doorbell chime in a two door two chime doorbell system. After researching the issue on the internet, I checked and discovered we had a 10VA transformer - hardly powerful enough for one chime. Replacing the old transformer with this one has made a complete difference. We are now able to hear the doorbell throughout the house as it was designed.
    Date published: 2009-12-30
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  • transformer

    will your 2 tone bar mechanical chimes work on a 24 volt system?
    Asked by: dakota
    Only if modified by running the solenoids in series. this would be providing 16v to each chime. they probably don't recommend it, but if the lead wire gauge can handle it, it's probably ok.
    Answered by: garbleduser
    Date published: 2016-08-20

    What transformers are useable for a vintage LA-151WM

    Asked by: TWK
    Thank you for your question on the model C907 transformer and the LA151WM door chime. For the LA151WM door chime, we would recommend using a 16 volt AC transformer that is rated for at least 15 VA (volt amps). The C907 is a 16 volt AC transformer that is rated at 30 VA. It should work fine with the LA151WM.
    Answered by: NuToneCustomerService
    Date published: 2016-06-13

    Most of the door chimes indicate that the C905 transformer should be used (it has smaller dimensions than the C907).

    What door chimes are large enough to accommodate the C907 as I need the higher wattage?
    Asked by: Ken
    Thank you for your question. All of our door chimes require 16V 10VAC. The C905 is our standard transformer for use with all chimes. The C907 is for use when pairing up to 3 chimes together, as each chime requires 10VA to operate properly. For further assistance, please contact Nutone Technical Support at 888-336-6151.
    Answered by: NuToneCustomerService
    Date published: 2017-08-10

    What is the amperage output?

    Asked by: Joe
    Thank you for your question on the model C907 power transformer. The C907 is rated at 16 volts AC and 30 volt amps (watts). That would be approximately 1-1/2 to 2 amps.
    Answered by: NuToneCustomerService
    Date published: 2014-11-19

    Is this transformer appropriate to use with a Ring Doorbell Pro?

    Is this a good transformer to use with a Ring Doorbell Pro? The Ring support site says that the Ring Doorbell Pro needs a transformer with 16 volts and 15-20 volt-amps, so the specs suggest it should work. But can you directly recommend this transformer to use with this device? Thanks.
    Asked by: Doc David
    Thank you for your question. The C907 is rated at 16V and 30VA. You may contact Ring for more information.
    Answered by: NuToneCustomerService
    Date published: 2017-11-08
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