SONOFF 4CHR3 – 4-Channel Wi-Fi RF Control Smart Relay Module
SONOFF 4CHR3 – 4-Channel Wi-Fi RF Control Smart Relay Module
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【WiFi Connected, No Hub Required】Connect directly to your home network via WiFi protocol, eliminating the need for additional gateways. Control devices remotely via the eWeLink app anytime, anywhere.
【Dry Contact for Smart Upgrades】Transform traditional devices into smart systems! Perfect for modernizing garage doors, motorized curtains, etc.
【Voice Control with Alexa & Google Home】Integrate seamlessly with popular smart ecosystems. Use voice commands to operate devices hands-free – "Alexa, turn off the garage light" or "Hey Google, close the living room curtains."
【High Load Capacity of 10A per Channel】Supports DC/AC inputs (100-240V) with robust 10A load management per channel. Safely control devices such as water heaters, pumps, and HVAC systems.
【Ready for DIN Rail Installation】Designed for standard DIN rail mounting, ensuring a clean and professional layout. This minimizes clutter and improves accessibility for maintenance.
Specifications & User Manual
SONOFF 4CHR3 is a 4-channel Wi-Fi smart switch with RF and app control, ideal for remotely managing lights, pumps, or motorized devices. With dry contact mode support, it's perfect for garage doors or curtains. Each channel supports up to 10A, and is designed for standard DIN rail mounting, ensuring a clean and professional installation. No hub required—just connect via Wi-Fi, control via the eWeLink app, or use voice commands with Alexa and Google Home for hands-free operation.
The 4CH R3 relay can only be powered by 230 V AC, while the 4CH PRO R3 can operate on both 230 V AC and 9 V–23 V DC.
The 4CH R3 relay is a single-phase 230 V AC relay, while the 4CH PRO R3 has 4 independent channels with NO/NC contacts (normally open / normally closed), allowing for switching any voltage (AC/DC) or use as a dry contact.
The 4CH R3 relay uses only Wi-Fi connection, while the 4CH PRO R3 not only has Wi-Fi, but also a 433 MHz RF receiver, which allows for remote control via a 433 MHz RF remote control or a wireless RF wall switch
4CHR3
100 - 240V AC 50/60Hz
10A/2200W/Gang 16A/3500W/Total
WiFi 2.4GHz
IEEE802.11 b/g/n 2.4GHz(2400M-2483.5M)
WPA/WPA2
PC V0
Four
145*90*34 (mm)
-10ºC-40ºC(14°F-104°F)
5%-95%RH, non-condensing
FCC, CE
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