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  • New item   Smart relay switch | 4-channel | 40A | 8800W | 100-240V | Wi-Fi | SONOFF | 4CHPROR3
    New item   Smart relay switch | 4-channel | 40A | 8800W | 100-240V | Wi-Fi | SONOFF | 4CHPROR3 1

    Smart relay switch | 4-channel | 40A | 8800W | 100-240V | Wi-Fi | SONOFF | 4CHPROR3

    Code: SONOFF-4CHPROR3
    Barcode: 6920075775815
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    Price 37.80 € VAT incl.
    ( 31.24 € VAT excl. )
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    SONOFF 4CHPROR3 is a 4-channel Wi-Fi relay with an RF 433 MHz receiver (10 A per channel, 40 A / 8800 W total). Three operating modes – self-locking, inching and interlock – for lighting, gates and pumps. Controlled with eWeLink, Alexa, Google Assistant and an RF remote.

  • Product description

    Smart relay switch | 4-channel | 40A | 8800W | 100-240V | Wi-Fi | SONOFF | 4CHPROR3

    SONOFF 4CHPROR3 is a four-channel Wi-Fi relay with an RF 433 MHz receiver. Each channel switches a load of up to 10 A, and the four circuits are controlled from the app, by voice, with an RF remote and with the buttons on the housing.

    Key idea:
    One controller for four circuits: lighting, pumps, gates or ventilation. Self-locking, inching and interlock modes make it suitable for both lighting and actuators.
    Channels
    4
    Load
    10 A per channel / 40 A total
    Connectivity
    Wi-Fi 2.4 GHz + RF 433 MHz
    Dimensions
    145 × 90 × 34 mm

    How it works

    The relay is powered from 100–240 V AC, and each of the four outputs switches a separate circuit of up to 10 A. Voltage is fed to the loads through the relay contacts.

    It can be controlled with the eWeLink app, by voice through Alexa or Google Assistant, with the housing buttons and with a 433 MHz RF remote that also works without internet.

    Each channel has a mode: self-locking (on / off), inching (short pulse, e.g. for gates) or interlock (only one channel on at a time).

    Why choose 4CHPROR3?
    Four channels, three operating modes and RF remote support in one housing make it a versatile solution when several loads must be controlled from one place with local control without internet.

    Technical specifications

    Product type Smart 4-channel Wi-Fi relay with RF 433 MHz receiver
    Manufacturer / model SONOFF 4CHPROR3
    Number of channels 4
    Supply voltage 100–240 V AC, 50/60 Hz
    Max. load per channel 10 A / 2200 W
    Max. total load 40 A / 8800 W
    Operating modes self-locking, inching, interlock
    Wireless Wi-Fi IEEE 802.11 b/g/n, 2.4 GHz; RF 433.92 MHz
    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.
    • RF 433 MHz remote – local control without internet (remote not included).
    • Inching mode – short pulse for gates, door locks or garage doors.
    • Interlock mode – only one channel on at a time, e.g. for motor directions.
    • Timers and scenes – circuits switch by schedule or sensors.
    • Voice control – Amazon Alexa and Google Assistant commands.

    Where is it used?

    • Yard and facade lighting groups
    • Irrigation pumps and valves
    • Gates, garage doors and dampers
    • Ventilation and heating circuits
    • Commercial lighting
    • Country houses and outbuildings

    Use by need

    For homeowners.
    Four circuits are controlled by phone, remote and schedule from one device.
    For electricians.
    One housing instead of four relays, clear terminals and three operating modes for different loads.
    For smart home integrators.
    RF and Wi-Fi control, inching and interlock modes suit automation of gates, pumps and actuators.

    Practical use

    If the yard needs control of lighting, an irrigation pump and a gate, 4CHPROR3 is installed in the panel: two channels switch the lighting and pump by schedule, and the third opens the gate with the remote in inching mode.

    Pros

    • Four channels in one housing
    • High total load – up to 40 A
    • RF 433 MHz remote support
    • Three operating modes
    • Local control without internet
    • Alexa and Google Assistant support

    Cons / limitations

    • Larger housing – does not fit a wall box
    • 2.4 GHz Wi-Fi only
    • RF remote sold separately
    • Large inductive loads require a contactor

    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 40 A total
    • Use contactors with protection for motors and pumps
    • Install in a dry place, in a panel or a sealed enclosure

    Quick selection guide

    4 channels
    10 A per channel
    40 A / 8800 W total
    Wi-Fi + RF 433
    3 operating modes
    For panel or enclosure
    Suitable when you need:
    • control four circuits from one place
    • control gates or locks in inching mode
    • have local RF remote control
    Check before use:
    • the current of each load
    • whether inching or interlock mode is needed
    • the installation place and housing size
    • the 2.4 GHz Wi-Fi signal
    Important reminder: 4CHPROR3 is not a protective device – each circuit needs appropriate protection with circuit breakers.

    FAQ

    Can it control gates?
    Yes, in inching mode the channel switches on briefly and triggers the gate automation input.
    Is a remote included?
    No, a 433 MHz RF remote such as RM433R2 is sold separately.
    What is the maximum load?
    Up to 10 A per channel and 40 A for all channels together.
    Does it work without internet?
    The housing buttons and the RF remote work without internet; the app needs a connection.
    What is interlock mode?
    Only one channel can be on at a time – this prevents conflicting commands.
    Is it suitable for three-phase devices?
    Not directly – the relay controls a contactor coil, and the contactor switches the three-phase load.

    Smart relay switch | 4-channel | 40A | 8800W | 100-240V | Wi-Fi | SONOFF | 4CHPROR3

    SONOFF 4CHPROR3 is a 4-channel Wi-Fi relay with an RF 433 MHz receiver: up to 10 A per channel and 40 A total, self-locking, inching and interlock modes, controlled by app, voice and remote.

    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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