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  • New item   Smart relay switch | 4-channel | 16A | 3500W | 100-240V | Wi-Fi | SONOFF | 4CHR3
    New item   Smart relay switch | 4-channel | 16A | 3500W | 100-240V | Wi-Fi | SONOFF | 4CHR3 1

    Smart relay switch | 4-channel | 16A | 3500W | 100-240V | Wi-Fi | SONOFF | 4CHR3

    Code: SONOFF-4CH-R3
    Barcode: 6920075775822
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    Price 29.40 € VAT incl.
    ( 24.30 € VAT excl. )
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    SONOFF 4CHR3 is a 4-channel Wi-Fi relay (10 A per channel, 16 A / 3500 W total) for controlling four circuits. Self-locking, inching and interlock modes, controlled with eWeLink, Alexa, Google Assistant and the housing buttons.

  • Product description

    Smart relay switch | 4-channel | 16A | 3500W | 100-240V | Wi-Fi | SONOFF | 4CHR3

    SONOFF 4CHR3 is a four-channel Wi-Fi relay for controlling four separate circuits. Each channel switches up to 10 A, and the total load of all channels is up to 16 A and 3500 W.

    Key idea:
    A compact solution when several small loads must be controlled from one place: lighting groups, fans or decorative lighting. Self-locking, inching and interlock modes.
    Channels
    4
    Load
    10 A per channel / 16 A total
    Connectivity
    Wi-Fi 2.4 GHz
    Dimensions
    145 × 90 × 34 mm

    How it works

    The relay is powered from 100–240 V AC, and the four outputs switch separate circuits. The total current of all channels must not exceed 16 A.

    It can be controlled with the eWeLink app, by voice through Alexa or Google Assistant and with the housing buttons.

    Each channel has a selectable mode: self-locking, inching (short pulse) or interlock (only one channel on at a time).

    Why choose 4CHR3?
    Four channels in one housing replace four separate relays, and three operating modes allow control of both lighting and pulse inputs of gates or locks.

    Technical specifications

    Product type Smart 4-channel Wi-Fi relay
    Manufacturer / model SONOFF 4CHR3
    Number of channels 4
    Supply voltage 100–240 V AC, 50/60 Hz
    Max. load per channel 10 A / 2200 W
    Max. total load 16 A / 3500 W
    Operating modes self-locking, inching, interlock
    Wireless Wi-Fi IEEE 802.11 b/g/n, 2.4 GHz
    Apps and integrations eWeLink, Amazon Alexa, Google Assistant
    Housing PC V0
    Operating temperature -10 °C … +40 °C
    Operating humidity 5–95 % RH, non-condensing
    Dimensions 145 × 90 × 34 mm

    Main functions

    • Four independent channels – each circuit is controlled separately.
    • Inching mode – short pulse for gates or locks.
    • Interlock mode – only one channel on at a time.
    • Timers and scenes – control by schedule or sensors.
    • Voice control – Amazon Alexa and Google Assistant.
    • Housing buttons – local channel control.

    Where is it used?

    • Home lighting groups
    • Decorative and yard lighting
    • Fans and air dampers
    • Pulse inputs of gates and locks
    • Office and shop lighting
    • Aquarium and terrarium equipment

    Use by need

    For homeowners.
    Four circuits are controlled by phone and schedule from one device.
    For electricians.
    One housing instead of four relays and three modes for different tasks.
    For smart home integrators.
    Inching and interlock modes suit automation of gates, locks and actuators.

    Practical use

    If a terrace has four lighting groups, 4CHR3 is installed in a sealed enclosure, each group is connected to a separate channel, and eWeLink scenes switch them on at sunset.

    Pros

    • Four channels in one housing
    • Three operating modes
    • Housing buttons for local control
    • Alexa and Google Assistant support
    • Simple installation

    Cons / limitations

    • Total load limited to 16 A
    • 2.4 GHz Wi-Fi only
    • No RF remote receiver
    • Does not fit a wall box

    Safety and installation notes

    • Switch off the power and check for voltage before installation
    • Installation must be done by a qualified electrician
    • Do not exceed 10 A per channel and 16 A total
    • Use contactors for motors and pumps
    • Install in a dry place or a sealed enclosure

    Quick selection guide

    4 channels
    10 A per channel
    16 A / 3500 W total
    Wi-Fi 2.4 GHz
    3 operating modes
    For panel or enclosure
    Suitable when you need:
    • control four lighting groups
    • control gates or locks in inching mode
    • automate several small loads
    Check before use:
    • the total current of all channels (up to 16 A)
    • whether inching or interlock mode is needed
    • the installation place and housing size
    • the 2.4 GHz Wi-Fi signal
    Important reminder: 4CHR3 is not a protective device – the circuits must be protected by circuit breakers.

    FAQ

    What is the maximum load?
    Up to 10 A per channel and 16 A for all channels together.
    Can it be controlled with an RF remote?
    No, for an RF remote choose 4CHPROR3.
    Can it control gates?
    Yes, in inching mode the channel switches on briefly and triggers the gate automation input.
    Does it work without internet?
    The housing buttons work; the app needs a connection.
    What is interlock mode?
    Only one channel can be on at a time.
    How does it differ from 4CHPROR3?
    4CHPROR3 has an RF 433 MHz receiver and a higher total load of up to 40 A.

    Smart relay switch | 4-channel | 16A | 3500W | 100-240V | Wi-Fi | SONOFF | 4CHR3

    SONOFF 4CHR3 is a 4-channel Wi-Fi relay: up to 10 A per channel and 16 A total, self-locking, inching and interlock modes, controlled with eWeLink, Alexa and Google Assistant.

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.

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