Description
SONOFF 4CHPROR3 is a 4-gang Wi-Fi smart switch built for users who need one controller for multiple loads, smart retrofits, and flexible automation projects. The official SONOFF product page positions this 4CHPROR3 smart switch as a practical choice for lights, pumps, fans, garage doors, and curtain motors because it combines Wi-Fi control, 433.92MHz RF control, and dry contact support in a single DIN-rail-ready device.
Compared with simpler relay products, SONOFF 4CHPROR3 gives installers three distinct working modes: self-locking for four independent loads, interlock mode for mutually exclusive channels, and inching mode for timed pulse switching. That makes the 4CHPROR3 Wi-Fi smart switch useful for both ordinary lighting control and more specialized automation such as garage door triggers, motorized curtains, and other smart upgrade scenarios.
Features
- 4-gang Wi-Fi smart switch architecture: control up to four connected circuits from one compact controller.
- RF control support: the official page highlights 433.92MHz RF control alongside app-based Wi-Fi operation.
- Three working modes: self-locking, interlock, and inching can be selected for different appliances and automation logic.
- Dry contact support: SONOFF specifically promotes 4CHPROR3 for smart upgrades such as garage doors and motorized curtains.
- 10A per channel capacity: the official copy states up to 10A per gang for AC load control.
- DIN rail mounting: suitable for cleaner installation inside control cabinets, panels, and structured electrical layouts.
- Alexa and Google Home compatibility: voice control can be used for lights, curtains, and other connected scenes.
Specifications
| Product Name | SONOFF 4CHPROR3 4-Gang Wi-Fi Smart Switch with RF Control |
| Model | 4CHPROR3 |
| Function | 4-gang Wi-Fi smart switch with RF control and dry contact support |
| Wireless Connectivity | Wi-Fi IEEE 802.11 b/g/n 2.4GHz |
| RF Frequency | 433.92MHz |
| Input | 100-240V AC 50/60Hz |
| Control Input | 9-23V |
| Maximum Load | 10A per gang, 40A total resistive load |
| Working Modes | Self-locking, interlock, and inching |
| Installation | DIN rail mounting |
| Voice Assistants | Amazon Alexa and Google Home |
| Recommended Uses | Garage doors, curtains, blinds, pumps, fans, and lighting control |
| Net Weight | 238g |
Applications
- Lighting automation for four independently controlled lamps or lighting circuits.
- Garage door and gate triggers where dry contact and timed pulse switching are useful.
- Curtain and blind control using interlock mode to prevent conflicting motor directions.
- Pump and ventilation control where app access, schedules, and voice operation improve convenience.
- DIN rail smart panel projects for installers who want structured multi-channel control in one device.
Product List
- 1 x SONOFF 4CHPROR3 4-gang Wi-Fi smart switch with RF control
- 1 x Official user manual
Other Content
Interlock mode is especially useful when one channel must turn on while the other channels turn off, which is why SONOFF shows this 4CHPROR3 smart switch in automation examples for blinds, garage doors, and other direction-sensitive devices. This helps customers understand where 4CHPROR3 fits better than a basic four-channel relay.
Inching mode also makes SONOFF 4CHPROR3 valuable for short-pulse switching tasks. The official page shows timed auto-off behavior, which is helpful in door control, trigger circuits, and installations where momentary activation is preferred over a latched output.
Voice control support with Amazon Alexa and Google Home adds another everyday use case for this 4-gang Wi-Fi smart switch, especially in homes where lights, fans, or curtains are already part of spoken automation routines.
Resources
FAQ
Q: What is SONOFF 4CHPROR3 used for?
A: SONOFF 4CHPROR3 is a 4-gang Wi-Fi smart switch for multi-load control, smart retrofits, garage doors, curtains, blinds, lighting, and similar automation tasks.
Q: What is the difference between self-locking, interlock, and inching mode?
A: Self-locking lets four connected loads work independently, interlock allows one active channel while the others turn off, and inching turns a channel off automatically after a timed pulse.
Q: Does 4CHPROR3 support dry contact applications?
A: Yes. SONOFF explicitly highlights dry contact support for smart upgrades such as garage doors and motorized curtains.
Q: Can this smart switch work with Alexa or Google Home?
A: Yes. The official product page lists both Amazon Alexa and Google Home compatibility.
Q: How much load can each channel handle?
A: The official SONOFF description states up to 10A per channel, with a total resistive load capacity of up to 40A.