# Magnetic switch MC38, alarm, NC, 100V

> MC38 magnetic contact for doors and windows, used in alarm and access control systems. NC contact, stays closed while the magnet is nearby and opens when separated. Supports up to 100V and 0.5A. Housing made of resistant ABS, quick mounting on frame and sash, with two wires for connection to the alarm system.

- Page: https://sigmanortec.ro/en/magnetic-switch-mc38-alarm-nc-100v
- Price: 6.03 RON
- Availability: In stock; 1-2 zile
- Reference: 9800 · EAN: 5948278919202
- Category: Mechatronics and IoT > Sensors and Modules > Magnetic and Hall Sensors
- Package (shipping data): 0.01 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 03:26 (Europe/Bucharest)

## Description

Magnetic contact for door and window, ideal in alarm and access control systems, detects opening by breaking the contact. NC contact remains closed as long as the magnet is close, supports up to 100V and 0.5A for signaling, resistant ABS housing, quick mounting on the frame and on the leaf with two wires for connection.
The MC-38 Magnetic Sensor is a magnetic door and window sensor designed for home alarm systems. This device detects the opening of a door or window and can activate an alarm or other security devices when the magnetic contact between the two components is broken. The sensor is easy to install, providing or not voltage on the two wires, depending on whether or not the magnet is detected in the proximity of the sensor.
Specifications:
Contact type: NC, Normally closed when the magnet is near the switch
Operating voltage: 100V
Operating current: 0.5A
Material: durable ABS
Use:
Mount the switch part (the one with wires) on the frame and the magnetic part on the door or window.
Make sure the devices are close together to maintain a closed circuit under normal conditions.
Connect the sensor to your alarm system or any compatible access control system. The sensor opens the circuit when the magnet is no longer in proximity to the sensor. The voltage that you want to use as a signal will pass through this sensor.