Smart relay Sonoff THR320D
Description
Sonoff TH Elite Wi-Fi smart relay (R3 – THR320D), 230V / 20A, NO/NC dry contact, LCD screen
The Sonoff THR320D is a new-generation smart relay from the TH Elite range, with significantly improved performance compared with the earlier TH10/TH16 series. With an optimised design and modern hardware, it is the ideal choice for automating air conditioning, heating, ventilation or irrigation systems based on temperature, air humidity or soil moisture.
Superior performance
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Processor speed increased by +50%
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ROM memory expanded by +300%
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Overall performance optimised by +200%
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Improved hardware and firmware structure for fast response and stability
Real-time monitoring with LCD screen
The digital screen continuously displays the measured temperature and humidity values, updated every 5 seconds. You see the ambient conditions directly without opening the app.
Full control via eWeLink
Control the relay remotely, set automations, create scenes and monitor sensor values from the free eWeLink app, available on Android and iOS.
Sensor-based automation
Works with sensors (purchased separately) for:
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Temperature and humidity: THS01, AM2301, SI7021
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Waterproof temperature: DS18B20
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Soil moisture: MS01
Quick connection via the RJ9 4P4C connector.
6-month data history
The app stores measured data for up to 6 months. You can analyse and export the history in .xlsx format.
Voice assistant compatibility
Control the device by voice using Amazon Alexa or Google Assistant.
Also compatible with IFTTT, Google Nest and other smart services.
NO/NC dry contact
Allows control of equipment with a potential-free contact – ideal for water heaters, boilers, HVAC systems, pumps, etc.
Output: 5–30V, max. 1A
Safety and quality
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High-temperature-resistant housing (PC V0 material)
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Surge and electrical discharge protection
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RoHS certification
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Robust construction for use in residential or industrial environments
Package contents:
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Sonoff THR320D smart relay
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User manual
Temperature/humidity sensors are purchased separately.
Practical use cases
- Fitted to the boiler or the heating circuit, it automatically regulates the temperature according to the daily schedule, reducing energy waste.
- Used to switch the heating on before you get home, controlling everything from the app wherever you are.
- Integrated with temperature sensors in other rooms for even and efficient heating throughout the home.
Technical specifications:
| Feature | Specification |
|---|---|
| Model | THR320D (TH Elite R3) |
| Power supply | 100–240V AC, 50/60Hz |
| Maximum load | 20A |
| Wi-Fi | 2.4 GHz, IEEE 802.11 b/g/n |
| Compatibility | eWeLink, Alexa, Google Assistant |
| Compatible sensors | THS01, DS18B20, MS01 (RJ9 4P4C) |
| Dry contact function | 5–30V, max. 1A |
| Operating temperature | -10°C ~ +40°C |
| Operating humidity | 5% – 95% RH, non-condensing |
| Dimensions | 98 × 54 × 31 mm |
| Housing material | Flame-retardant PC V0 |
| Data storage | 6 months, .xlsx export |
Choose the Sonoff THR320D for complete, safe and smart control of the appliances in your home or technical space!
Technical specifications:
| Model | THR320D (TH Elite) |
| Protocol | WiFi 802.11 b/g/n, 2.4GHz |
| Power supply | 100-240V AC, 50/60Hz |
| Relay load | max 20A |
| Dry contact output | 5-30V, max 1A |
| Compatible sensors | DS18B20, MS01, THS01, AM2301, Si7021 |
| Display | LCD, updated every 5 seconds, history up to 6 months |
| Compatibility | eWeLink, Amazon Alexa, Google Home |
The THR320D is the ideal choice for anyone who wants to cut heating bills through smart, programmable temperature control.