The ZEN78 High Power Relay is a 40A-rated Z-Wave relay designed for reliable switching of high-power 240VAC applications. With built-in overcurrent protection (triggering at 40.5A) and dual double-pole relays, it can disconnect both hot legs (L1 and L2) simultaneously—making it ideal for large appliances and heavy-duty systems.
It also includes:
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Dry contact switch terminal for a wired mechanical switch (manual on/off).
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Onboard action button for manual control, Z-Wave inclusion/exclusion, and factory reset.
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Integrated temperature sensor for protection and monitoring.
⚠️ Important Note: The ZEN78 is not IP66 rated and must be installed indoors. Outdoor use requires additional weatherproofing within the device’s temperature specifications.
Common Use Cases (240VAC up to 40A)
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Pool pumps
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Electric water heaters or boilers
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Air compressors
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Air conditioners (mini splits)
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High-power outlets
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Shop vacuums
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Commercial lighting
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Heated driveways
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EV charging stations
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High-power appliances (ovens)
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Electric heaters (garages, warehouses)
Recommended Accessories for the ZEN78 Relay
To ensure the best performance and safety when installing the ZEN78 High Power Relay, consider the following compatible accessories:
1. Mechanical Switches (Toggle or Rocker Style)
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The ZEN78 supports a standard dry contact mechanical switch.
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Either toggle or rocker switches can be used for straightforward manual control.
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The switch must be dry contact only (no voltage applied to the input).
2. Momentary Switches (Push Button)
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For advanced control, the ZAC99 momentary switch is a compatible option.
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Momentary switches provide short press/hold functions, useful for triggering automations and scenes.
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As with mechanical switches, the input must remain voltage-free.
3. Outdoor Weatherproofing (If Installed Outdoors)
Since the ZEN78 is not weather-rated, outdoor installations require:
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SOCKiTBOX (medium or large) – a heavy-duty, weatherproof enclosure designed to protect electrical connections from rain, snow, and dirt.
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Always confirm installation remains within the device’s operating temperature range.
Summary
The ZEN78 High Power Relay is a powerful and versatile Z-Wave solution for automating and protecting high-load 240VAC applications. To get the most from your installation:
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Use a standard toggle or rocker mechanical switch for basic manual control.
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Add a ZAC99 momentary switch for flexible automation.
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Protect outdoor installations with a SOCKiTBOX enclosure.
By pairing the ZEN78 relay with the right accessories, you can maximize safety, functionality, and durability while ensuring reliable performance for your heavy-duty smart switch setup.
