Product detailed description

 🏠 Manage Your Home Comfortably with the PRO Version

The Sonoff 4CH PRO R3 Wi-Fi Smart Switch with RF Control is an advanced 4-gang smart switch. Unlike the standard R3 version, the PRO model is equipped with dry contact (voltage-free) outputs and an added 433 MHz RF receiver, making it exceptionally flexible for demanding integrations in your smart home.

With its 4 dry contact relays, this device is absolutely ideal for controlling irrigation systems, motorized garage doors, driveway gates, boilers, and heating valves. The outputs do not pass the 230V mains voltage directly like the standard model does; instead, they act as simple mechanical switches (NO/NC/COM).

The Sonoff 4CH PRO R3 is easy to install on a standard DIN rail inside an electrical distribution board. It is fully compatible with the eWeLink mobile app, available for both iOS and Android. Wi-Fi connectivity allows you to control your devices remotely from anywhere. Furthermore, thanks to the 433 MHz RF control, you can pair wireless RF remotes and key fobs to the relay, allowing you to operate devices even without an internet connection or your smartphone.

The device is compatible with Amazon Alexa and Google Assistant, letting you control connected appliances with simple voice commands. It also supports three selectable hardware working modes in the app—Inching, Interlock, and Self-Locking—ensuring maximum safety. For example, the Interlock mode is perfect for controlling roller blinds, ensuring two opposing motors cannot be powered at the same time.

Parameters

• 🔌 Maximum Current Per Channel: 10A
• 🔌 Total Maximum Current: 40A (10A per channel)
• ⚡ Power Supply: 100-240V AC or 9-23V DC
• 🔄 Relay Contact Type: Dry contact / voltage-free relay (NO, NC, COM)
• 📶 Wi-Fi Connection: 2.4 GHz (not compatible with 5 GHz)
• 📡 RF Control: Supports 433 MHz radio remote controllers
• 📱 App Compatibility: eWeLink (iOS, Android)
• 🗣️ Voice Control: Amazon Alexa, Google Assistant
• ⏱️ Supported Features: Inching, Interlock, Self-Locking, timers, smart scenes
• 🔧 Mounting: DIN rail mount (indoor use only)
• 📏 Dimensions: 145 x 90 x 34 mm
• ✅ Certifications: CE, FCC, RoHS
• 🛡️ Material: Fire-retardant PC V0

The Sonoff 4CH PRO R3 is the perfect solution for homes and buildings seeking flexibility and specialized wiring options. The combination of dry contacts, Wi-Fi, and RF control opens up endless possibilities for your smart home setup.

Possible Irrigation Wiring with Dry Contact Outputs