Description
The SONOFF 4CHPROR3 is a professional 4-channel smart switch designed to give you flexible and reliable control over up to four electrical devices independently. It supports multiple control methods, including Wi-Fi, 433MHz RF remote control, manual physical buttons, and smart app control through eWeLink. The device offers versatile working modes such as inching, self-locking, and interlock, making it suitable for a wide range of automation scenarios.
Designed for DIN rail mounting, the 4CHPROR3 is ideal for smart homes, offices, workshops, and industrial control cabinets. It allows centralized management of lighting, motors, gates, pumps, and other electrical systems with high stability and safety. With remote access, scheduling, automation scenes, and voice assistant compatibility, the SONOFF 4CHPROR3 delivers professional-grade performance, flexibility, and convenience for advanced smart control applications.
Key Features
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4 Independent Channels
Control four different devices separately from one smart module.
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Wi-Fi + RF Remote Control (433 MHz)
Control via eWeLink App, or use RF remotes when Wi-Fi is not available.
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Multiple Control Modes
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Self-locking – Each channel toggles ON/OFF individually
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Inching Mode – Automatically turns OFF after a set time (0.5s–1h)
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Interlock Mode – Only one channel ON at a time (ideal for shutters or motors)
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App & Voice Control
Works with eWeLink, Amazon Alexa, Google Assistant, and SmartThings.
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DIN Rail or Wall Mount Installation
Designed for professional setups in electrical cabinets or control panels.
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Timers, Schedules & Smart Scenes
Automate devices with countdowns, schedules, or custom smart scenes.
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Safe & Durable Design
Supports AC & DC power input, features overload protection and flame-retardant housing.
Technical Specifications
| Specification |
Details |
| Model |
SONOFF 4CHPROR3 |
| Channels |
4 × Independent Relays |
| Power Input |
100–240V AC / 9–23V DC |
| Max Load per Channel |
10A / 2200W (per channel) |
| Wireless Protocols |
Wi-Fi 2.4GHz IEEE 802.11 b/g/n, RF 433 MHz |
| Control Modes |
Self-locking / Inching / Interlock |
| App Support |
eWeLink (iOS & Android) |
| Voice Assistants |
Amazon Alexa, Google Assistant, SmartThings |
| DIN Rail Support |
Yes (Standard 35mm DIN rail) |
| Operating Temperature |
-10°C to +40°C |
| Material |
PC V0 Flame-Retardant |
| Dimensions |
145 × 90 × 34 mm |
Why Choose SONOFF 4CHPROR3?
Control 4 devices independently via Wi-Fi, RF, or manual buttons
Ideal for curtains, garage doors, pumps, lighting, irrigation, motors
DIN rail mounting for professional installation
Smart automation with timers, inching, interlock modes
Compatible with voice assistants & smart home ecosystems
