Kidde - Edwards 1840-N Rare Earth Magnetic Switch Accessory

Product Description

The KIDDE - EDWARDS 1840-N is a rare earth magnetic switch accessory designed for use in fire door holder systems. Rare earth magnets deliver significantly stronger holding force in a compact form compared to standard ferrite magnets, making this accessory well suited for heavier fire-rated doors that require reliable hold-open control. Licensed fire alarm and life safety technicians typically install and service this type of component as part of a compliant door holder assembly in commercial and institutional buildings.

This switch accessory is used in fire magnetic door holder applications where a release mechanism must respond to a fire alarm signal. When the alarm activates, the door holder releases, allowing the fire-rated door to close and compartmentalize smoke and flame spread. It is sold individually and is appropriate for new installations as well as service replacement work on existing door holder systems.

Key Features

• Rare earth magnet construction provides high holding force in a compact footprint
• Designed as a switch accessory component for fire magnetic door holder assemblies
• Sold as a single unit for precise replacement or add-on installation
• Engineered for integration into life safety and fire alarm control systems

Compatibility

Designed as an OEM-style switch accessory for fire magnetic door holder assemblies. Verify compatibility with the specific door holder model prior to installation, as no additional model-specific compatibility data was provided.

Installation Notes

Installation should be performed by a qualified fire alarm or life safety technician in accordance with NFPA 72, NFPA 80, and applicable local codes. Disconnect and lock out all power to the door holder circuit before servicing or replacing any components. Confirm proper alignment and secure mounting of the switch accessory to ensure reliable door release operation during an alarm event.