---
product_id: 561038718
title: "Shelly Pro 3EM Switch Add-On | Expand The Capabilities of Pro 3EM with Dry Contacts 2A | Contactor Control | DIN Rail Mount | Home Automation | iOS Android App | No Hub Required"
brand: "shelly"
price: "฿3983"
currency: THB
in_stock: true
reviews_count: 13
category: "Shelly"
url: https://www.desertcart.co.th/products/561038718-shelly-pro-3em-switch-add-on-expand-the-capabilities-pro
store_origin: TH
region: Thailand
---

# 2A dry contact switching App & voice control, no hub DIN rail mount ready Shelly Pro 3EM Switch Add-On | Expand The Capabilities of Pro 3EM with Dry Contacts 2A | Contactor Control | DIN Rail Mount | Home Automation | iOS Android App | No Hub Required

**Brand:** shelly
**Price:** ฿3983
**Availability:** ✅ In Stock

## Summary

> ⚡ Upgrade your smart home game with pro-level power control!

## Quick Answers

- **What is this?** Shelly Pro 3EM Switch Add-On | Expand The Capabilities of Pro 3EM with Dry Contacts 2A | Contactor Control | DIN Rail Mount | Home Automation | iOS Android App | No Hub Required by shelly
- **How much does it cost?** ฿3983 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/561038718-shelly-pro-3em-switch-add-on-expand-the-capabilities-pro)

## Best For

- shelly enthusiasts

## Why This Product

- Trusted shelly brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Hub-Free Smart Automation:** Manage your home remotely via iOS/Android app or voice assistants without extra hubs.
- • **Custom Scheduling & Scenes:** Create personalized timers and automation scenes for ultimate control and energy efficiency.
- • **Sleek DIN Rail Installation:** Compact, professional-grade mounting that integrates perfectly with your existing setup.
- • **Robust Dry Contact Switching:** Control external devices up to 240V AC/30V DC at 2A for versatile appliance management.
- • **Seamless Load Control Expansion:** Effortlessly automate load shedding and solar management with added switching power.

## Overview

The Shelly Pro 3EM Switch Add-On enhances your Shelly Pro 3EM by adding dry contact switching capabilities rated at 2A, enabling advanced load control such as appliance disconnection and solar/battery management. It mounts easily on a DIN rail, operates on low voltage supplied by the main device, and supports app and voice control without requiring a hub. Perfect for professionals seeking reliable, scalable home automation with precise scheduling and seamless integration.

## Description

Shelly Pro 3EM Switch Add-On | Expand The Capabilities of Pro 3EM with Dry Contacts 2A | Contactor Control | DIN Rail Mount | Home Automation | iOS Android App | No Hub Required : desertcart.co.uk: Business, Industry & Science

Review: Fantastic works fab A1 smart meter - A1 works fantastic ,great app to use for control working well with ecoflow stream .
Review: Reliable and Consumer Unit compatible - Reliable and Consumer Unit compatible. Fitted multiple units and have had perfect reliability and good accuracy for last 6 months.

## Features

- 𝗦𝗺𝗮𝗿𝘁 𝗟𝗼𝗮𝗱 𝗖𝗼𝗻𝘁𝗿𝗼𝗹 𝗘𝘅𝗽𝗮𝗻𝘀𝗶𝗼𝗻: Adds switching capabilities to the Shelly Pro 3EM for automating load shedding, appliance disconnection, and solar/battery management
- 𝗗𝗿𝘆 𝗖𝗼𝗻𝘁𝗮𝗰𝘁 𝗦𝘄𝗶𝘁𝗰𝗵𝗶𝗻𝗴: Controls external loads with dry contacts rated at up to 240 V AC or 30 V DC, and a maximum current of 2 A
- 𝗗𝗜𝗡-𝗥𝗮𝗶𝗹 𝗠𝗼𝘂𝗻𝘁𝗶𝗻𝗴: Installs next to the Shelly Pro 3EM and operates on 3.3 V or 12 V supplied directly by the device
- 𝗔𝗽𝗽 & 𝗩𝗼𝗶𝗰𝗲 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: Control from anywhere using the Shelly Smart Control app or voice assistants like Alexa, Google Home, or SmartThings - 𝗻𝗼 𝗵𝘂𝗯 𝗿𝗲𝗾𝘂𝗶𝗿𝗲𝗱
- 𝗦𝗰𝗵𝗲𝗱𝘂𝗹𝗶𝗻𝗴 & 𝗧𝗶𝗺𝗲𝗿𝘀: Set up timers and personalized schedules per channel or create scenes for full-home automation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Shelly |
| Product Dimensions | 12 x 6 x 19 cm; 20 g |
| Item model number | Shelly_Pro_Add |
| Manufacturer | Shelly Europe |
| Colour | White |
| Are Batteries Included | No |
| Number of Lithium Metal Cells | 1 |
| Item Weight | 20 g |
| Guaranteed software updates until | unknown |

## Images

![Shelly Pro 3EM Switch Add-On | Expand The Capabilities of Pro 3EM with Dry Contacts 2A | Contactor Control | DIN Rail Mount | Home Automation | iOS Android App | No Hub Required - Image 1](https://m.media-amazon.com/images/I/714nLkRns4L.jpg)
![Shelly Pro 3EM Switch Add-On | Expand The Capabilities of Pro 3EM with Dry Contacts 2A | Contactor Control | DIN Rail Mount | Home Automation | iOS Android App | No Hub Required - Image 2](https://m.media-amazon.com/images/I/71NbO6--KXL.jpg)
![Shelly Pro 3EM Switch Add-On | Expand The Capabilities of Pro 3EM with Dry Contacts 2A | Contactor Control | DIN Rail Mount | Home Automation | iOS Android App | No Hub Required - Image 3](https://m.media-amazon.com/images/I/81iq0IO6iOL.jpg)
![Shelly Pro 3EM Switch Add-On | Expand The Capabilities of Pro 3EM with Dry Contacts 2A | Contactor Control | DIN Rail Mount | Home Automation | iOS Android App | No Hub Required - Image 4](https://m.media-amazon.com/images/I/71BO1pq3ehL.jpg)
![Shelly Pro 3EM Switch Add-On | Expand The Capabilities of Pro 3EM with Dry Contacts 2A | Contactor Control | DIN Rail Mount | Home Automation | iOS Android App | No Hub Required - Image 5](https://m.media-amazon.com/images/I/71HylrEI4VL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fantastic works fab A1 smart meter
*by P***L on 4 January 2026*

A1 works fantastic ,great app to use for control working well with ecoflow stream .

### ⭐⭐⭐⭐⭐ Reliable and Consumer Unit compatible
*by A***N on 28 December 2025*

Reliable and Consumer Unit compatible. Fitted multiple units and have had perfect reliability and good accuracy for last 6 months.

### ⭐⭐⭐⭐⭐ Perfect with Home Assistant
*by J***M on 8 January 2026*

Love this product and it’s perfectly complimented when added to Home Assistant. I now regularly check out my energy consumption via my HA Dashboard. Had these installed in their own mini consumer unit next to my main one with room to add more in the future.

## Frequently Bought Together

- Shelly Pro 3EM Switch Add-On | Add-On Pro 3EM Dry Contacts DIN Rail Mounting | Home Automation | iOS Android app | No Hub Required | Solar Panels | Wind Turbines
- Shelly Pro EM 50A | Wi-Fi & LAN Energy Meter with Contactor Control | DIN-Rail | Home Automation | Bluetooth Gateway | Compatible with Alexa & Google Home | No Hub Required | Power Monitoring
- Shelly H&T Gen3 White | Wi-Fi & Bluetooth Smart Temperature & Humidity Sensor with Remote App Control | Smart Scenes | LCD Display

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-03-01*