SONOFF 4CH Pro R3 4-Gang Wi-Fi & RF Smart Switch – DIN Rail Relay Controller, Dry Contact Support, eWeLink App, Alexa & Google Assistant Compatible
Overview:
• The SONOFF 4CH Pro R3 is a professional 4-Gang Wi-Fi & RF Smart Switch designed to control four independent electrical circuits from one DIN rail relay controller.
• It supports remote control through the eWeLink App, allowing users to turn each channel ON/OFF separately, set timers, create schedules, and build smart automation scenes.
• The device supports 433MHz RF remote control, making it more flexible than the standard SONOFF 4CH R3, especially in projects that require app control and local RF control together.
• It supports Self-Locking Mode, Interlock Mode, and Inching Mode, making it suitable for lighting, gates, shutters, motors, pumps, access control, and automation panels.
• The 4CH Pro R3 also supports Dry Contact / No-Voltage Contact and NO/NC contact scenarios, which makes it suitable for professional low-current control applications and integration with other systems.
Key Features:
• 4-Gang Wi-Fi & RF Smart Switch for controlling 4 independent circuits.
• Remote Control via eWeLink App.
• Voice Control compatible with Amazon Alexa & Google Assistant.
• 433MHz RF Remote Control Support.
• Dry Contact / No-Voltage Contact Support.
• NO / NC Contact Support for flexible control scenarios.
• Self-Locking Mode for independent ON/OFF control.
• Interlock Mode for one-channel-at-a-time operation.
• Inching Mode for pulse / momentary control.
• Timer & Schedule Control for automatic ON/OFF operation.
• Smart Scene Control with compatible SONOFF devices.
• Manual Control Buttons for local operation.
• DIN Rail Installation suitable for electrical panels and automation boxes.
• Important Note: 4CH Pro R3 supports RF and dry contact features, while standard 4CH R3 does not provide the same Pro-level contact flexibility.
Technical Specifications:
• Model Name: SONOFF 4CH Pro R3 / 4CHPROR3.
• Brand: SONOFF.
• Product Type: 4-Gang Wi-Fi & RF Smart Relay Controller.
• Series: 4CH Pro Series.
• Channels: 4 Channels / 4-Gang.
• Working Modes: Self-Locking / Interlock / Inching.
• Wireless Connectivity: Wi-Fi IEEE 802.11 b/g/n 2.4GHz + 433MHz RF.
• Control App: eWeLink App.
• Voice Assistant Support: Amazon Alexa & Google Assistant.
• Input Voltage: 100–240V AC, 50/60Hz or 9–23V DC.
• Max Load: 10A per Gang.
• Max Switching Power: 2200W per Gang.
• Max Output Voltage: 250V AC or 30V DC per Channel.
• Contact Type: NO / NC / Dry Contact Support.
• Security Mechanism: WPA-PSK / WPA2-PSK.
• Material: PC V0 Flame-Retardant Material.
• Color: White.
• Dimensions: 145 × 90 × 40 mm.
• Working Temperature: 0°C to 40°C.
• Installation Type: DIN Rail / Electrical Panel Installation.
• Application: Indoor Electrical Control & Automation.
Applications:
• Smart lighting control.
• Multi-zone appliance control.
• Gate and access control pulse operation.
• Motor and shutter control using interlock mode.
• Pump control through proper electrical protection/contactors.
• Low-current dry contact control applications.
• Automation control panels.
• Villas and apartments.
• Offices and commercial spaces.
• eWeLink smart automation systems.
Connect Gates Recommendation:
• Recommended by Connect Gates for professional automation projects that require 4 independent relay channels, 433MHz RF control, Dry Contact support, and flexible working modes such as Self-Locking, Interlock, and Inching.