Shelly
Shelly Pro 3
Shelly Pro 3
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Shelly Pro 3 | 3-Channel DIN Rail Smart Switch with LAN, Wi-Fi & Bluetooth
Shelly Pro 3 is a DIN rail mountable 3-channel smart switch with potential-free contacts, capable of switching three completely independent circuits, including 3-phase ones. Enhanced with Gen2 firmware flexibility and LAN connectivity, it provides professional integrators with numerous configuration options for end-customer solutions.
It can operate standalone in a local Wi-Fi network or be integrated into cloud home automation services. Shelly Pro 3 can be accessed, controlled, and monitored remotely from anywhere with an internet connection. The device features an embedded Web Interface for monitoring, control, and configuration.
Main Applications
- Residential (apartments, condominiums, homes)
- MDU (Multi-Dwelling Units such as hotels)
- Light commercial (small offices, retail stores, restaurants, gas stations)
- Government and municipal facilities
- Universities and colleges
Integrations
- Google Home
- Samsung SmartThings
- Amazon Alexa
Device Interfaces
Inputs
- 3 switch/button inputs (S1, S2, S3)
- 2 power supply inputs (N and L)
- 3 relay inputs (I1, I2, I3)
Outputs
- 3 relay outputs (O1, O2, O3)
Ethernet Port
1 RJ45 connector
⚠ CAUTION: Plug or unplug the LAN cable only when the device is powered off. The LAN connector must not have metallic parts exposed to the user.
Connectivity
- Wi-Fi
- Ethernet (LAN)
- Bluetooth
Safety Features
- Overheating protection
Supported Load Types
- Resistive (incandescent bulbs, heaters)
- Capacitive (electronics, motor start capacitors)
- Inductive with RC Snubber (LED drivers, fans, transformers, compressors)
User Interface
Inputs
1 tactile dome button
- Press & hold 5s: Reboot
- Press & hold 10s: Factory reset
LED Indicators
- Power (Red): Power supply connected
- Wi-Fi: Blue (AP mode), Red (STA not connected), Yellow (STA connected, no cloud), Green (Connected to Shelly Cloud)
- LAN (Green): LAN connected
- Out 1/2/3 (Red): Corresponding relay closed
Specifications
| Category | Specification |
|---|---|
| Physical | Size: 96x53x59 mm | Weight: — | Mounting: DIN rail | Shell: Plastic (Black) |
| Environmental | Temp: -20°C to 40°C | Humidity: 30–70% RH | Altitude: up to 2000m |
| Electrical | AC Supply: 110–240V | DC Supply: N/A | Power Consumption: <3W | Neutral required: Yes |
| Output Ratings | Max AC Voltage: 240V | Max DC Voltage: 30V | Max Current: 16A per channel (48A total) |
| Sensors | Internal temperature sensor: Yes |
| Radio | Wi-Fi 802.11 b/g/n | Range: 30m indoors / 50m outdoors | Bluetooth 4.2 |
| MCU | ESP32-D0WDQ6 | Flash: 8 MB |
| Firmware | Schedules: 20 | Webhooks: 20 (5 URLs each) | Scripting: Yes | MQTT: Yes | CoAP: No |
Share

I needed a couple of Shelly Pro 3s. Had I purchased them locally (NZ), they would have cost me nearly $400.
Oz Smart things got them to me in a week. The cost? A shade over $250.
While I cannot review the Shellys yet, what was overwhelmingly impressive was OST's speed in getting the (tracked) shipment underway.
Guess where I'll be shopping if I need more gear...
PT.
Great little switch I can control my sauna from phone app, It's ready to walk into when I get home, no waiting
