---
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: "NT$2937"
currency: TWD
in_stock: true
reviews_count: 5
category: "Shelly"
url: https://www.desertcart.tw/products/561038718-shelly-pro-3em-switch-add-on-expand-the-capabilities-pro
store_origin: TW
region: Taiwan
---

# 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:** NT$2937
**Availability:** ✅ In Stock

## Summary

> ⚡ Upgrade your energy game with Shelly Pro 3EM Switch Add-On — smart control, zero compromises!

## 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?** NT$2937 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/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 like Alexa and Google Home—no extra hub needed.
- • **Custom Scheduling & Scenes:** Create personalized timers and automation scenes to optimize energy use and elevate your smart home lifestyle.
- • **Plug & Play DIN Rail Mount:** Compact, sleek design installs directly beside your Pro 3EM for a clean, professional setup.
- • **Robust Dry Contact Switching:** Control external devices safely with dry contacts rated up to 240V AC/30V DC and 2A max current.
- • **Seamless Load Control Expansion:** Effortlessly add smart switching to your Shelly Pro 3EM for dynamic load shedding and appliance automation.

## Overview

The Shelly Pro 3EM Switch Add-On enhances your Shelly Pro 3EM by adding dry contact switching capabilities rated for up to 2A, enabling advanced load control, appliance automation, and solar/battery management. It mounts easily on a DIN rail next to the Pro 3EM and supports app and voice control without requiring a hub. Perfect for professionals seeking precise energy management and seamless integration into smart home ecosystems.

## Description

From the manufacturer Dry Contacts Dry Contacts enable connection to devices like traditional switches or sensors, enhancing home automation without supplying voltage through the contacts. Dry Contacts Dry Contacts enable connection to devices like traditional switches or sensors, enhancing home automation without supplying voltage through the contacts. Lightning Control Integrate the Shelly Pro 3EM with a Shelly Pro 3EM Switch Add-on for lighting control by combining its monitoring capabilities with a compatible switching device for effective lighting management. Lightning Control Integrate the Shelly Pro 3EM with a Shelly Pro 3EM Switch Add-on for lighting control by combining its monitoring capabilities with a compatible switching device for effective lighting management. Connectivity Enhance your Shelly Pro 3EM with the Switch Add-On for seamless control. Easily monitor and manage up to three independent circuits, ensuring efficient energy use and improved device connectivity. Connectivity Enhance your Shelly Pro 3EM with the Switch Add-On for seamless control. Easily monitor and manage up to three independent circuits, ensuring efficient energy use and improved device connectivity. Energy Metering Shelly Pro 3EM Switch Add-On Energy Metering offers precise three-phase energy monitoring. Easy to install, it supports real-time data, remote control, and integration with home automation systems. Energy Metering Shelly Pro 3EM Switch Add-On Energy Metering offers precise three-phase energy monitoring. Easy to install, it supports real-time data, remote control, and integration with home automation systems. Power Supply Add reliable power to your Shelly Pro 3EM with this Switch Add-On Power Supply. Ensure consistent performance and monitor your energy usage effortlessly. Compact, efficient, and easy! Power Supply Add reliable power to your Shelly Pro 3EM with this Switch Add-On Power Supply. Ensure consistent performance and monitor your energy usage effortlessly. Compact, efficient, and easy! Neutral Wire Upgrade your Shelly Pro 3EM with the Switch Add-On for precise control and enhanced functionality. Compatible with neutral wires, it ensures stable, reliable operation for your smart home setup. Neutral Wire Upgrade your Shelly Pro 3EM with the Switch Add-On for precise control and enhanced functionality. Compatible with neutral wires, it ensures stable, reliable operation for your smart home setup. Switch Expansion Load Shedding Weather-Based Control PV Systems Balancing Shelly Pro 3EM Switch Add-on is created to provide switch functionality for the Shelly Pro 3EM device. It contains dry contact relay that can commutate up to 2A for controlling a contactor.​ Track solar and wind energy with Shelly Pro 3EM Add-on. Control consumption, monitor real-time energy data, and auto-switch off non-essential appliances for energy savings.​ Enhance Shelly Pro 3EM with the Add-on for weather-driven energy optimization. Script appliance control based on real-time weather updates. For instance, auto-adjust heating for sunny days.​ Shelly Pro 3EM Add-On optimizes excess PV energy by automatically activating appliances like water heaters or EV charging stations. Maximize solar energy use and reduce grid dependency.​ Technical Information Shelly Pro Series Comparison Table Shelly Pro 3EM Add-On Shelly Pro 3EM (120А) Shelly Pro 3EM (400А) Shelly Pro EM 50

Review: 💯 compatible zendure - Impeccable, les données remontent bien via HA, pilotage nickel avec zendure
Review: Works fine, but I wish it didn't need to exist. - It works, but the fact that this thing even needs to exist is mid. Why can't the Pro 3EM just have a contactor built in like the Pro EM-50 does, and the 3EM used to have? Seems like the Pro 3EM has taken a step back in some ways.

## 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 |
|---------------|-------|
| ASIN | B0C718B37C |
| Best Sellers Rank | 2,653 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 1 in Solar & Wind Energy Power Meters 3,448 in Components & Replacement Parts |
| Brand | Shelly |
| Customer Reviews | 4.6 out of 5 stars 91 Reviews |
| EU Spare Part Availability Duration | 5 Years |
| Global Trade Identification Number | 03800235268131 |
| Included Components | 1 pack |
| Item Dimensions | 9.4 x 1.9 x 6.9 centimetres |
| Item Weight | 20 Grams |
| Item dimensions L x W x H | 9.4 x 1.9 x 6.9 centimetres |
| Item weight | 20 Grams |
| Manufacturer | Shelly Europe |
| Manufacturer Part Number | 3800235268131 |
| Material | Stainless Steel |
| Model Number | Shelly_Pro_Add |
| Number of Items | 1 |
| Number of items | 1 |
| Product Warranty | 5. |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** Shelly
- **Connector type:** Screw
- **Contact material:** Steel
- **Contact type:** Normally Open
- **Current rating:** 2 Amps
- **International protection rating:** IP00
- **Item dimensions L x W x H:** 9.4 x 1.9 x 6.9 centimetres
- **Mounting type:** DIN Rail Mount
- **Operating voltage:** 12 Volts (DC)
- **Switch type:** Contactor Control

## 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

### ⭐⭐⭐⭐⭐ 💯 compatible zendure
*by A***E on 23 July 2026*

Impeccable, les données remontent bien via HA, pilotage nickel avec zendure

### ⭐⭐⭐ Works fine, but I wish it didn't need to exist.
*by S***N on 21 July 2026*

It works, but the fact that this thing even needs to exist is mid. Why can't the Pro 3EM just have a contactor built in like the Pro EM-50 does, and the 3EM used to have? Seems like the Pro 3EM has taken a step back in some ways.

### ⭐⭐⭐⭐⭐ Tut was es soll
*by M***O on 1 May 2026*

Gut. Einfach zu installieren. Aber ohne cloud-anbindung bringt es gar nichts. Vor allem, wenn man mit dem Gerät balkonkrafter steuern möchte

## 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 Taiwan*
*Store origin: TW*
*Last updated: 2026-08-14*