Heath Zenith

Model # 121AC-A

Internet # 100626843

Wired Door Chime Transformer-DISCONTINUED

This item has been discontinued.
The Home Depot no longer carries this specific product.

$13.94 /each



Model # 121AC-A

Internet # 100626843

The 121AC is a wired door chime transformer. Features a 120VAC input and 16VAC-15VA output. The transformer is a lock nut type.

  • Replacement Low Voltage Hardwired Transformer
  • UL Approved
  • For use with any wired door chime
  • Requires 20 AWG Minimum


Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Accessory Type 
Door Bell Or Intercom Type 
Door Bells 
Electrical Product Type 
Door Bell Accessory 
Product Weight (lb.) 
0.946 lb 
Warranty / Certifications
Manufacturer Warranty 
1 Year 


Rated 5.0 out of 5 by 5 reviewers.
Rated 5.0 out of 5.0 by Door chime transformer I have personally installed over 500 of these transformers and have found them to be outstanding in every way. April 7, 2009
Rated 5.0 out of 5.0 by Solved the problem! Installing a second door bell to an existing one I found that I needed a larger transformer output. To the Home Depot website I went and found exactly the one I needed. Ordering was easy over the phone (web-site billing portion down at the time) and it was shipped immediately and arrived in a reasonable number of days. The old as well as the new doorbell ring through there whole chime cycle and now we can hear the bell when in the family room August 31, 2011
Rated 5.0 out of 5.0 by Good product I called the mfg before ordering and got the details on how to install and confirmation it would do the job. It did just as they said and was easy to install. Good Product July 16, 2013
Rated 5.0 out of 5.0 by Transformer Easy install (hard to put it in wrong) . Fit exhisting electrical box. Took about 15 min to do the job. January 25, 2011
Rated 5.0 out of 5.0 by 15 watt wired door bell transformer This product works great and what you need to operate two doorbell chimes. January 22, 2011
  • 2015-07-01T13:58:57.349-05:00
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