Magnetic Reed Switch (Side) KONTAKTRON KN-CA40 — KN-CA40 no name

The Magnetic Reed Switch (Side) KONTAKTRON KN-CA40 is a compact side-mounted magnetic contact sensor designed for detecting the presence or absence of a magnet. Its narrow, side-fit form factor makes it suitable for installation in door and window frames, cabinets or narrow profiles where space is limited. The device operates as a mechanical switch that closes or opens in response to a magnetic field, providing a simple and reliable interface for alarm, control and position-sensing systems.

Advantages

The side-mounted design enables installation in slim frames and tight spaces without protruding parts. As a mechanical reed switch, it provides a straightforward electrical contact change in response to a magnetic field, ensuring compatibility with most alarm panels and control inputs. The compact construction supports discreet integration and stable operation with low power consumption when used in monitoring circuits.

Suitable for

• Door and window alarm sensors in residential and commercial security systems
• Cabinet, locker and gate position monitoring
• Simple proximity detection in alarm and automation controls
• Retrofit installations where space constraints require a side-mounted sensor

Key specifications

• Mounting orientation: side-mounted form factor for narrow profiles
• Operating principle: magnetic reed contact (mechanical switch activated by magnet)
• Typical applications: security sensors, position detection, proximity switching
• Physical characteristics: compact, low-profile housing suitable for frame installation
• Electrical interface: closes/opens contact in presence/absence of magnetic field (requires compatible alarm/control input)

How to use

Install the reed switch in the frame or profile on the moving part (for example the door or window frame) so that the matching magnet is positioned on the moving leaf and aligns with the switch when closed. Connect the switch leads to the alarm panel or control input according to the system wiring diagram, observing proper polarity if applicable and ensuring secure electrical connections. Test the sensor by moving the magnet into and out of proximity to confirm the contact opens and closes as expected. Secure the switch in place using screws or adhesive as appropriate for the mounting surface.

Usage recommendations

Place the magnet and switch at a consistent gap to ensure reliable activation; avoid excessive separation or misalignment. Use the switch within the electrical ratings and environmental conditions supported by the host alarm or control system. For outdoor or high-moisture environments, provide additional sealing or protection, and verify compatibility with the installation substrate before fixing.