Does the Shelly Pro 3 measure energy consumption?

No. The Shelly Pro 3 only switches the load via dry contacts and does not measure consumption. For per-phase energy metering you need the Shelly Pro 3EM model.

Can the Shelly Pro 3 switch a three-phase line?

Yes. The three outputs O1, O2 and O3 are potential-free contacts rated 16 A each, so each channel can carry a separate phase, allowing synchronous switching of a three-phase line.

What network connections does the Shelly Pro 3 have?

The device has wired Ethernet via an RJ45 port, Wi-Fi 802.11 b/g/n in the 2.4 GHz band and Bluetooth 4.2. Wired Ethernet is useful in metal switchboards where the radio signal is weak.

How is the Shelly Pro 3 mounted?

It mounts on a DIN rail inside the distribution board. The housing is 96x53x59 mm and the screw terminals accept 0.5–2.5 mm² conductors at a torque of 0.4 Nm. Installation is done by a certified electrician.

Can the Shelly Pro 3 be controlled without the cloud?

Yes. An embedded web interface runs on the ESP32-D0WDQ6 processor, through which the device can be monitored and configured locally. It is also compatible with Home Assistant, Google Home and Amazon Alexa.

Do you offer installation and warranty for the Shelly Pro 3 in Moldova?

CasaSmart is the official Shelly importer in Moldova. Switchboard installation is done by a certified electrician in Chisinau and across the country; consultation is free, while the site visit and design are paid. Warranty is 24 months.

Shelly Pro 3 relay 3×16 A DIN-rail

Name: Shelly Pro 3 — three-channel DIN-rail relay 3×16 A with Ethernet, Wi-Fi and Bluetooth
Brand: Shelly
SKU: SHELLY-PRO-3

casasmart.md

Shelly Pro 3 — releu pe trei canale pe sina DIN 3×16 A cu Ethernet, Wi-Fi si Bluetooth - main

Compatibility

Works with these ecosystems

Protocols

Wi-Fi
BLE
Ethernet

Ecosystems

Home Assistant
Google Home
Amazon Alexa

What it is, who it's for, what it does

About this product

The Shelly Pro 3 is a second-generation three-channel relay built for DIN-rail mounting inside a distribution board. Its three outputs O1, O2 and O3 are dry (potential-free) contacts rated at 16 A each and up to 48 A in total, so every channel switches fully independently — the device confidently controls three separate circuits or a single three-phase line.<br><br>The Pro line stands out with wired connectivity: an RJ45 port provides stable Ethernet, while built-in Wi-Fi 802.11 b/g/n and Bluetooth 4.2 remain as backup and for initial setup. The embedded web interface lets the installer monitor and configure the device locally, without the cloud.<br><br>The 96×53×59 mm housing with screw terminals for 0.5–2.5 mm² conductors is intended for professional switchboard installation. Mounting of the Shelly Pro 3 in Chisinau and across Moldova is carried out by a certified electrician; operating voltage is 110–240 V with consumption below 3 W.

Delivery
Free from 1500 MDL
Returns
30 days to return
Warranty
24 months

15+projects delivered300+devices installed3 yearslocal-first experienceChișinăushowroom Columna 153Book a showroom visit →

CasaSmart essentials

What it works with, what it needs, what you can do

Verified compatibility

We test every device for these ecosystems. For non-standard integrations contact us before ordering.

Home Assistant
Zigbee
Matter
KNX
Wi-Fi

Install & requirements

What you need on your side and what we deliver.

Zigbee hub or Matter gateway for wireless variants
65 mm back-box or DIN panel for wired variants
Local setup on Home Assistant — included in install

Request install quote

Smart scenarios

Three typical automations we set up after the install.

01Morning: warm light + blinds up + climate at 22 °C
02Leaving: lights off, arm sensors, close the gas
03Evening: warm ambient + cinema scene

Where it works

Use cases

Warehouse hall or large yard lighting turns on and off with a single scheduled command.

Synchronous switching of all three phases of one lighting circuit through potential-free contacts O1-O3.

An electrician assembles three separate channels on a single Pro 3 in an apartment board in Chisinau.

Separate control of a pump, a boiler and a socket group on one DIN module.

A metal board shields Wi-Fi, so the module is connected to the router with an RJ45 cable.

Wired Ethernet and an embedded web interface give cloud-free control.

Analytics

See consumption — save on bills

Real-time consumption tracking via the eWeLink app. Daily, weekly and monthly history helps identify the most energy-hungry devices.

For the installer

Technical specifications

full spec · wiring · datasheet

Power

Channels (relay): 3 независимых (O1, O2, O3), беспотенциальные контакты
Current per channel: 16 A
Total current: 48 A
Макс. коммутируемое напряжение: 240 AC / 30 DC V
Operating voltage: 110-240 V
Own consumption: < 3 W

Wireless

Wi-Fi: 802.11 b/g/n (2.4 GHz)
Bluetooth: 4.2

Connectivity

Ethernet: 1 x RJ45
Processor: ESP32-D0WDQ6

Physical

Dimensions: 96 x 53 x 59 mm
Mounting: DIN-рейка
Сечение провода клемм: 0.5-2.5 mm²
Terminal tightening torque: 0.4 Nm

Environment

Operating temperature: -20 ... +40 °C
Humidity: 30-70 % RH
Макс. высота: 2000 m

Full device datasheet

Support

Frequently asked questions

Does the Shelly Pro 3 measure energy consumption?
No. The Shelly Pro 3 only switches the load via dry contacts and does not measure consumption. For per-phase energy metering you need the Shelly Pro 3EM model.
Can the Shelly Pro 3 switch a three-phase line?
Yes. The three outputs O1, O2 and O3 are potential-free contacts rated 16 A each, so each channel can carry a separate phase, allowing synchronous switching of a three-phase line.
What network connections does the Shelly Pro 3 have?
The device has wired Ethernet via an RJ45 port, Wi-Fi 802.11 b/g/n in the 2.4 GHz band and Bluetooth 4.2. Wired Ethernet is useful in metal switchboards where the radio signal is weak.
How is the Shelly Pro 3 mounted?
It mounts on a DIN rail inside the distribution board. The housing is 96x53x59 mm and the screw terminals accept 0.5–2.5 mm² conductors at a torque of 0.4 Nm. Installation is done by a certified electrician.
Can the Shelly Pro 3 be controlled without the cloud?
Yes. An embedded web interface runs on the ESP32-D0WDQ6 processor, through which the device can be monitored and configured locally. It is also compatible with Home Assistant, Google Home and Amazon Alexa.
Do you offer installation and warranty for the Shelly Pro 3 in Moldova?
CasaSmart is the official Shelly importer in Moldova. Switchboard installation is done by a certified electrician in Chisinau and across the country; consultation is free, while the site visit and design are paid. Warranty is 24 months.

Same ecosystem

Works together

Devices that run in the same smart-home ecosystem.

Shelly

Shelly Wave Pro Dimmer 2PM Z-Wave 2-Channel DIN Dimmer Metering

—

Shelly

Shelly Wave Pro Dimmer 1PM Z-Wave DIN-rail dimmer with metering

—

Shelly

Shelly Wave PRO 3 LR – Z-Wave DIN 3-channel relay 16A

—

Shelly

Shelly Wave Pro Shutter - Z-Wave DIN-rail roller shutter and blind controller

—

Shelly

Shelly Wave PRO 2PM Z-Wave 2-channel DIN-rail relay with metering

—

Shelly

Shelly Wave Pro 2 - Z-Wave 2-channel DIN-rail relay

—

Same category

Questions about this product?

A CasaSmart manager calls you within 1–2 working hours and answers anything — compatibility, install, alternatives.

+373 60 944 922

Updated: 18 June 2026· reviewed by CasaSmart Expert Team

Compatibility