SONOFF
SONOFF 4CH Pro R3
- HACS component
- Local control
- Wi-Fi
Prices verified October 2026
See more relays & dimmer modules picks on our Amazon storefront →Our verdict
A DIN-rail 4-gang Wi-Fi relay for consumer-unit-level jobs — four 10A channels with interlock/self-locking modes that suit a garage door, gate motor, or multi-zone valve setup. It's Wi-Fi and 433MHz RF only (there's no Zigbee variant, despite what some listings imply), and stock firmware has no official HA integration: your realistic routes are the AlexxIT SonoffLAN HACS integration over eWeLink LAN mode, or reflashing to Tasmota for a fully local MQTT setup. Supports both live/neutral and dry-contact/no-neutral wiring modes, which is unusually flexible for older UK circuits.
What can Home Assistant control on the SONOFF 4CH Pro R3?
| Control | Type | What it does |
|---|---|---|
| Channel 1-4 | Switch | Each of the four DIN-rail relay channels appears as its own independent switch entity. |
| Interlock/self-lock mode | Unsupported | Not surfaced by the integration as a select, switch, or sensor — configure it once in the eWeLink app before pairing. |
| Status LED | Switch | Created disabled by default; must be manually enabled to toggle the panel LED from HA. |
| Signal strength | Sensor | Wi-Fi signal diagnostic, useful for troubleshooting LAN-mode drop-outs on a DIN-rail unit tucked inside a metal consumer unit. |
SonoffLAN maps each of the four channels to its own independent switch entity, so per-channel automations, history, and templating all work exactly like separate switches. Interlock/self-locking mode isn't exposed by the integration in any form — not even as a read-only attribute — so you set it once in the eWeLink app before handing the device to HA, and it stays fixed regardless of what HA does afterward. Reported issues describe individual channels on this exact multi-relay model drifting out of sync with the physical relay state until the unit is power-cycled or re-paired, a quirk tied to the 4-channel firmware rather than single-channel Sonoff devices. Because per-channel pulse timing also isn't exposed, a garage-door/gate automation has to fake the momentary trigger in HA (turn the channel on, wait briefly, turn it off) rather than relying on any onboard cycle timer.
Specs
| mount | DIN rail |
|---|---|
| channels | 4 |
| wiring modes | live/neutral or dry-contact/no-neutral |
| interlock mode | true |
| neutral required | false |
| max load a per channel | 10 |
How does the SONOFF 4CH Pro R3 compare?
| Product | From | Protocol | Local control | Integration |
|---|---|---|---|---|
| SONOFF 4CH Pro R3 (this product) | £25.63 | Wi-Fi | Yes | HACS |
| Aqara Dual Relay Module T2 | £29.74 | Zigbee | Yes | Zigbee2MQTT / ZHA |
| Aqara Single Switch Module T1 (No Neutral) | £26.99 | Zigbee | Yes | Zigbee2MQTT / ZHA |
| Candeo Zigbee Dimmer Module (C-ZB-DM204) | £39.99 | Zigbee | Yes | Zigbee2MQTT / ZHA |
Frequently asked questions
- Does the SONOFF 4CH Pro R3 work with Home Assistant locally?
- Yes. The SONOFF 4CH Pro R3 is controlled locally in Home Assistant through a community integration installed through HACS (sonoff), so it keeps working if your internet connection or the SONOFF cloud goes down. Control and state updates stay on your own network.
- Which protocol does the SONOFF 4CH Pro R3 use, and do I need a hub?
- The SONOFF 4CH Pro R3 uses Wi-Fi. To pair it with Home Assistant you need no hub — it joins your Wi-Fi network directly. SONOFF's own hub is not required when you integrate through a community integration installed through HACS (sonoff).
- How much does the SONOFF 4CH Pro R3 cost in the UK?
- The lowest price we have listed for the SONOFF 4CH Pro R3 is £25.63 at Amazon UK. Prices were last checked in October 2026 and change often, so confirm on the retailer's page before buying.