---
product_id: 532372084
title: "weideer 2pcs MC-31B Magnetic Reed Switch Wired Surface Mount Normally Open Closed NC NO Door Contact Sensor Alarm Magnetic Door Switch Black"
brand: "weideer"
price: "3066 kr"
currency: ISK
in_stock: true
url: https://www.desertcart.is/products/532372084-weideer-2pcs-mc-31b-magnetic-reed-switch-wired-surface-mount
store_origin: IS
region: Iceland
---

# 0.5A max current 100V DC max voltage 10W max power weideer 2pcs MC-31B Magnetic Reed Switch Wired Surface Mount Normally Open Closed NC NO Door Contact Sensor Alarm Magnetic Door Switch Black

**Brand:** weideer
**Price:** 3066 kr
**Availability:** ✅ In Stock

## Summary

> 🔒 Secure Your Space, Elevate Your Peace of Mind!

## Quick Answers

- **What is this?** weideer 2pcs MC-31B Magnetic Reed Switch Wired Surface Mount Normally Open Closed NC NO Door Contact Sensor Alarm Magnetic Door Switch Black by weideer
- **How much does it cost?** 3066 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/532372084-weideer-2pcs-mc-31b-magnetic-reed-switch-wired-surface-mount)

## Best For

- weideer enthusiasts

## Why This Product

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

## Key Features

- • **🏠 Versatile Use:** Perfect for wooden doors and windows in both homes and factories.
- • **🔍 Seamless Security:** Elevate your home security with reliable NC/NO functionality.
- • **🛠️ Easy Installation:** Surface mount design ensures a hassle-free setup in minutes.
- • **🔗 Reliable Connectivity:** Works seamlessly with your existing alarm system for peace of mind.
- • **🛡️ Fireproof Assurance:** Crafted from fireproof ABS material for enhanced durability.

## Overview

The Weideer MC-31B Magnetic Reed Switch is a versatile and reliable door contact sensor designed for home security systems. With a compact size of 55x12.5x11.5mm, it features a maximum switch voltage of 100V DC, a current of 0.5A, and a power capacity of 10W. This sensor is ideal for wooden doors and windows, providing both normally closed (NC) and normally open (NO) options. It comes with two sets of switches and screws for easy installation.

## Description

weideer 2pcs MC-31B Magnetic Reed Switch Wired Surface Mount Normally Open Closed NC NO Door Contact Sensor Alarm Magnetic Door Switch Black

## Features

- Product name:Surface Mount Magnetic Reed Switch.Type:MC-31B.Color:Black.Material: fireproof ABS material.Product size: 55X12.5X11.5mm / 2.17" x 0.45" x 0.45"(L*W*H).Maximum Switch Voltage: 100V DC.Maximum switch current: 0.5A.Maximum switch power: 10W.
- Contact Type: NC/NO/COM: NC means Normally Closed.When the magnet together, the circuit is conductive; when the magnet separate, the circuit is not conductive.NO means normally open: when the magnets are separated, the circuit is turned on ; when the magnets are together, the circuit is not turned on. Actuation Distance: 10-20mm.
- Reed switch can be used in home security and burglar alarm system. It is an ideal choice for wooden doors and windows in homes and factories.
- Magnetic Reed Switch can not connect directly to power, It needs to work with the alarm system. It provides a switching signal.
- Package Content:2 sets Magnetic Reed Switch+8pcs Screws

## Product Details

- **Operation Mode:** automatic
- **Operating Voltage:** 1E+2 Volts (DC)
- **Contact Type:** Normally Open, Normally Closed
- **Connector Type:** Screws
- **Brand:** weideer
- **Terminal:** Screw
- **Circuit Type:** 1-way
- **Mounting Type:** Surface Mount
- **Number of Positions:** 1
- **Control Method:** Touch

## Images

![weideer 2pcs MC-31B Magnetic Reed Switch Wired Surface Mount Normally Open Closed NC NO Door Contact Sensor Alarm Magnetic Door Switch Black - Image 1](https://m.media-amazon.com/images/I/71Q9CWvV5vL.jpg)

## Available Options

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

## Frequently Bought Together

- weideer 2pcs MC-31B Magnetic Reed Switch Wired Surface Mount Normally Open Closed NC NO Door Contact Sensor Alarm Magnetic Door Switch Black
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**Shop now:** [https://www.desertcart.is/products/532372084-weideer-2pcs-mc-31b-magnetic-reed-switch-wired-surface-mount](https://www.desertcart.is/products/532372084-weideer-2pcs-mc-31b-magnetic-reed-switch-wired-surface-mount)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-20*