SONOFF 4CHR3 4-channel Wi-Fi smart switch

The SONOFF 4CHR3 is a 4-channel Wi-Fi smart switch for switching lighting, pumps, appliances, and motorised devices on or off remotely. It connects over Wi-Fi and is controlled through the eWeLink app. Voice control is available with Amazon Alexa and Google Assistant, and the switch works with Apple Home via Matter, SmartThings, and Home Assistant. It handles loads up to 3,500 W, with a maximum switching current of 16 A. The AC supply input range is 100–240 V, and the device switches loads rather than dimming them.

The housing is made from flame-retardant PC V0. DIN-rail mounting suits installation in indoor electrical enclosures and control panels. The switch is AC-mains-powered and connects via wired AC terminals. Self-locking, interlock, and inching modes offer options for maintaining a switched state, running channels as mutually exclusive pairs, or switching off after a set interval. One switch is included in the pack.

Key Features:

• 2.4 GHz Wi-Fi frequency band for wireless network connectivity.
• IEEE 802.11 b/g/n Wi-Fi standards supported.
• RF connectivity in addition to Wi-Fi.
• Weekly schedules and sunrise/sunset automation for time-based switching.
• Physical switch inputs provide a wired control option.
• 145 × 34 × 90 mm dimensions help assess enclosure fit.