Which Zooz Dimmer model should I use for my set-up?

The differences for the ZEN72 and ZEN77/ZEN74 models are similar to those of their 500 series predecessors, the ZEN22 and ZEN27, where they are wired differently in 3-way (or larger) installations and support different loads. Please note that while the ZEN74 is a Toggle style dimmer, it is electrically the same as the ZEN77 with the same load/wiring/installation requirements. The only difference here is in the paddle versus toggle style. The ZEN72 does not have a toggle-style equivalent dimmer.

Please note: both the ZEN72 and ZEN77/74 can be used in single pole or 3-way set-ups. They are simply recommended in certain scenarios based on the load that will be connected or to make installation / wiring easier.

The ZEN72 Dimmer is recommended for single pole installations, set-ups involving smart bulbs, or locations / loads with 6 or more bulbs.

• It can handle up to 150 Watts of LED bulbs on load.
• The ZEN72 is a TRIAC dimmer so if your bulbs work better with leading-edge drivers, this model will work better. 

The ZEN77/ZEN74 Dimmer is recommended for 3-way and 4-way installations since you won't need to rewire your other switches in the set-up, you can simply replace the main switch with direct connection to power with the ZEN77 dimmer.

• This model can control up to 100 Watts of LED bulbs but we don't recommend using it in installations with chandeliers or large groups of lights over 6 bulbs.
• Version 1.0 and 2.0 of the ZEN77 (700 series Z-Wave chip) were MOSFET dimmers so if your bulbs work better with trailing-edge (or reverse-phase) drivers, those versions of the model worked best.
• Version 3.0 of the ZEN77 (700 series Z-Wave chip) is now a TRIAC dimmer so if your bulbs work better with leading-edge drivers, this model will work better.
• The 800 series version of the ZEN77 is also a TRIAC dimmer.

Why We Changed to all TRIAC: We found that newer LED bulbs dimmed better with TRIAC dimmers, and considering limited availability for MOSFETS, we decided to transfer the ZEN77 model to TRIAC as well. 

None of the dimmers can be used to control fans, ballast tube lights, or switched receptacles. For more set-ups, please check out our complete guide to Zooz switches and dimmers.

Not sure which model dimmer you currently have? You can find the models engraved on the front metal part of the units (remove wall plate first), or full specifications printed on the back of the devices. If something in this article is confusing or if an attribute is missing from the chart, please let us know and we'll make it better!