White-Rodgers Emerson 90-T60C3 24VAC 60-VA Foot Mount Class 2 Transformer

As long as you've got the room in your workspace, this transformer is easy to install with two sheet metal screws (not supplied). Nice that you have input voltage options from 120 to 240 (using clearly colored wires) depending on your line voltage. Output is ~24 volts (measured). The 60 VA rating allows you to run multiple 24 volts systems (like an HVAC stat + zone panel) without worries of stressing the transformer or heat sinks. Additionally, there is a built-in breaker easily accessible via a rocker switch built into the transformer. So if your 24V system goes offline, this is the first and easiest thing to check. The only thing to be alert for is the size of this unit. Because of the 60 VA rating, the entire part is larger than a lighter duty part. So if you are replacing a part with a lesser VA rating (e.g. 35 or 40), be careful of the clearances in your workspace. Amazon offered competitive pricing vs. other electronic/HVAC supply merchants. Overall, this part is highly recommended if you've got the space. It is made in China, which makes a difference to some buyers.

I use this with a Wyze thermostat, installed transformer at my Ruud/Rheem air handler in place of OEM part, IIRC I had to drill one hole, and it all fit well enough. Wyze thermostat working well now. Didn't have to connect up blue C wire to thermostat. Seems to take power to run the thermostat from the Rc/Rh red wire without needing the blue wire. Was surprised by that. Other Wyze installs I had to connect up that blue C wire. Note that OEM transformer is only 40mVA so this one provides extra juice to run the electronic thermostat.

This one in particular will be use in a pool pump control panel. I bought this as inexpensive insurance to keep as a spare, I do this with many components (like capacitors and contactors in condenser units). These take a few minutes to install and save you hundreds of dollars. This transformer is very well built!

Installed on an older AC/heater unit and working good so far. Great price compared to other ones I found online. The leads are long so install in the old unit was easy.

Installed this transformer in the air handler of the home A/C as a replacement for the original transformer. The foot mount had the same profile as the original and no new holes had to be drilled in the mounting surface. Just screwed in place like the original.

Filament Transformer kept blowing due to a shorted Thermostat or Thermal switch. This allowed us to troubleshoot and find out which one was faulty. Saved us from buying multiple transformers.

Working fine, no problem yet after 2 months of installation.

Was so easy to purchase this on line. Beats going from store to store.

Haven't used it yet but I like the built in breaker!