Sonoff · 4CHPROR3

Sonoff 4CH Pro R3 (4CHPROR3) 4-gang Wi-Fi+RF smart switch, dry contact

Name: Sonoff 4CH Pro R3 (4CHPROR3) 4-gang Wi-Fi+RF smart switch, dry contact
Brand: Sonoff
SKU: SONOFF-4CHPROR3
Price: 1049 MDL
Availability: InStock

1,049 MDLIn stock

Relays & in-wall modules

Wi-Fi

Manufacturer images

1,049 MDLIn stock

Buy with installation

Check compatibility

Connectivity: Wi-Fi, RF 433 MHz
Channels (relays): 4
Neutral wire (N): Required

A 433 MHz key fob (sold separately) opens the gate at short range without phone or router, while eWeLink keeps the schedules — the 4CH Pro R3 packs four 10 A relays into one DIN box.

No separate hub required

Connects straight to the router over Wi-Fi; no gateway needed.

Source ↗

30 specifications from manufacturer documents

We deliver across Moldova. Availability, delivery timing and cost are confirmed with a manager before order fulfilment.

The right choice starts with specifications

Device passport

SKU: SONOFF-4CHPROR3 · Document model: 4CHPROR3

Specifications checked against the linked manufacturer documents. Load limits, package details and measurement conditions are retained.Checked 18 October 2026

Connectivity and compatibility8

Connectivity — what it means The wireless link or network the device uses. Wi-Fi connects straight to the router; Zigbee, Thread and Bluetooth Mesh work through a hub or gateway.	Wi-Fi, RF 433 MHz2.4 GHz Wi-Fi (802.11 b/g/n) plus a 433.92 MHz receiver: each channel learns a button of an RF remote and works from it without Wi-Fi at short range. The remote is not included [1]
Hub required — what it means Whether the device needs a separate hub, gateway or coordinator to work in a smart home. If so, it is sold separately unless stated otherwise.	No hub neededConnects straight to the router over Wi-Fi; no gateway needed [2]
Matter support — what it means Whether the device supports the Matter standard, directly or through a bridge. Matter lets you add it to Apple Home, Google Home, Alexa and Home Assistant.	Via the maker's bridge hubVia the eWeLink CUBE built-in Matter bridge (Cube OS, e.g. on iHost); the Wi-Fi module itself does not support Matter [2]
Works without internet — what it means Whether the device keeps working over the local network or through a hub when the internet is down. Cloud features (remote access, voice assistants) need the internet.	YesLAN Control: eWeLink control over the local network without internet. The 433 MHz RF remote also works without Wi-Fi [1]
Home Assistant — what it means How the device connects to Home Assistant: a built-in integration, a Zigbee coordinator, Matter or the maker’s cloud integration.	Via a Zigbee coordinator or hubThe maker lists Home Assistant via the eWeLink CUBE Matter bridge [2]
App — what it means The maker’s app used to set up and control the device.	eWeLink [1]
Radio frequencies and transmit power	Wi-Fi 2412–2472 MHz; RF 433.92 MHz (receive only) [1]
Transmit power — what it means The coordinator's maximum radio output. Higher power gives a steadier link to distant devices, but range in a home depends more on walls and the number of routers in the network.	20 dBmWi-Fi up to 20 dBm (EU) [1]

Control and features5

Channels (relays) — what it means How many independent loads the module switches: 1 — one light circuit or appliance, 2 — two circuits (e.g. chandelier and accent lights), 4 — a panel unit for several circuits.	4 [2]
Wired wall switch input — what it means Whether you can keep an ordinary wall switch or push button and wire it to the module, so the light works from both the switch and the app. Shows which switch types are supported; on dimmers a momentary button usually also adjusts brightness when held.	No inputNo terminals for an external switch; the housing has a button for each channel [1]
Energy metering — what it means Whether the switch shows in the app how much the connected appliance uses: live power and accumulated kWh.	NoEnergy metering is not in the manual's specifications or feature list [1]
Special relay modes — what it means Modes beyond on/off. Pulse: the relay switches itself off after a set time (bell, lock, gate). Interlock stops two channels being on at once. Motor mode drives curtains or a gate: up, down, stop.	Pulse / auto-off timer (inching), channel interlockModes are set in eWeLink: self-locking (normal on/off), interlock (only one of the four channels on), inching — auto-off after 0.5–3600 s [3]
Power-on state after outage	Set in eWeLink (Power-on State) [1]

Housing and installation6

Neutral wire (N) — what it means Whether the wall box needs a neutral wire. Older wiring often brings only the live wire to the switch; then pick a model that works without N.	RequiredOn 100–240 V mains both L and N are needed. The module can also be powered from 9–23 V DC, in which case no mains neutral is needed for the module itself [1]
Mounting — what it means How and where it is installed: in a wall box, on a wall or ceiling, on a DIN rail, on a table or in a socket.	DIN rail (panel)Mounts on a 35 mm DIN rail [1]
Dimensions (W × H × D) — what it means The device’s size in millimetres as the maker states it. Check that it fits the wall box, niche or shelf.	145 × 90 × 34 mm [2]
Housing material	Polycarbonate PC V0 (V0 flammability class) [2]
Certifications — what it means Standards and certifications the maker lists for this model (for example CE, RoHS, Zigbee 3.0, Matter).	FCC, CE [2]
Upstream circuit breaker	MCB or RCBO rated 40 AManual requirement: an MCB or RCBO of this rating must be installed before the module [1]

Power and load8

Max current per channel — what it means Highest current through one relay with a resistive load. 10 A at 230 V is about 2,300 W of heater or incandescent lamps; for LEDs and motors the permitted load is lower.	10 A10 A / 2200 W per channel; 40 A / 8800 W total max [2]
Dry contact (volt-free output) — what it means The relay only opens or closes its contacts without putting voltage on them. This is how boilers, gates, barriers and other devices with a control input are connected.	YesEach channel has volt-free contacts (normally open, common, normally closed). To power a load, live is fed to the common contact (manual diagrams) [3]
Max total current — what it means Current the device handles across all channels at once. On multi-channel models the total is often lower than per-channel current × number of channels.	40 A40 A / 8800 W total [2]
Max power per channel (resistive) — what it means Power of incandescent lamps, heaters and other resistive loads per channel at 220–240 V. For LEDs, motors and power supplies the permitted power is lower.	2200 W [2]
LED load per channel — what it means Total LED lamp wattage per channel that the maker allows. Add up the watts of all lamps on that circuit and compare; for dimmers only dimmable lamps count. If the maker gives the figure in VA or as a total for all channels, the note says so.	Not stated by the manufacturer
Module power supply — what it means Where the device gets its power: 230 V mains, an adapter, USB, batteries or a built-in battery.	AC mains, Low-voltage DC100–240 V AC mains or 9–23 V DC [2]
Supply voltage — what it means The supply voltage (and current, if stated) as the maker gives it. It must match your mains or adapter.	100–240 V AC, 50/60 Hz or 9–23 V DC [2]
Max total power (resistive)	8800 W [2]

Operating conditions2

Operating temperature — what it means The air temperature range the device is rated for. The lower limit matters outdoors, on balconies and in unheated rooms.	−10…40 °C [2]
Operating humidity — what it means The rated relative humidity range, non-condensing.	5–95%Non-condensing [2]

Package contents2

Package contents — what it means What comes in the box, per the maker.	Relay × 1, manual × 1 [3]
Manufacturer warranty — what it means The warranty period the maker states. Confirm warranty terms in Moldova with the seller.	24 months“2-Year Hassle-Free Warranty” in the official SONOFF store [2]

Manufacturer documents

Clear purchase details

Delivery and stock

We deliver across Moldova. Availability, delivery timing and cost are confirmed with a manager before order fulfilment.

How is payment handled?

A website order is submitted for confirmation without charging your card. The payment method and final amount are agreed with a manager before payment.

Warranty and documents

The warranty is at least 12 months. The exact period and conditions for equipment and installation work are stated in the sales documents and the accepted proposal. Further support is agreed for each project.

Can I return the product?

Current conditions are published on the Return policy page. Email office@casasmart.md with your order number for the steps relevant to your situation. Statutory consumer rights continue to apply.

Delivery, payment and returns

In your home

Your home greets you with light — even at night.

With your hands full or on a nighttime trip down the hall, finding a switch is awkward. Routines light the way and turn off forgotten lights.

See the complete solution

A hallway at night with soft floor-level lighting — An example routineWalk in — the light turns on by itself.

What to check before buying

A neutral wire (N) is required: check it is in the back box, the box depth, the rated load and the manufacturer diagram.
Check Wi-Fi band, app, region and internet requirements.

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