LCN SEM7830-689 Magnetic Door Holder, Surface Wall Mount, Low Profile Armature, 12V-24V-120V Tri Voltage, Aluminum Painted Finish

The LCN SEM7830-689 is a surface wall-mounted magnetic door holder designed to keep fire and smoke doors safely held open until an alarm signal releases them. Built with a low-profile armature and finished in durable aluminum painted (689), this holder integrates cleanly into commercial life-safety systems. Its tri-voltage design accepts 12V, 24V, or 120V without additional components, simplifying installation across a wide range of building configurations. When the fire alarm is triggered, the electromagnet de-energizes and instantly releases the door, allowing an attached closer to move it to the closed position. It's a dependable choice for corridors, stairwells, and other openings requiring code-compliant hold-open functionality.

Features

• Surface wall-mounted design for straightforward installation in most commercial openings.
• Low-profile armature provides a compact, unobtrusive contact surface at the door.
• Tri-voltage capability supports 12V, 24V, and 120V without changing components.
• Aluminum painted finish (689) offers a clean appearance and corrosion resistance.
• Releases the door automatically upon fire alarm activation for reliable life-safety performance.

Functional Details

The SEM7830 uses an electromagnet that holds the door open while energized. When the connected fire alarm system signals or power is interrupted, the magnet releases, freeing the door so a closer can pull it shut and help contain smoke and fire.

• Electromagnetic holders release the door when the fire alarm system is activated.
• Available in single voltage or tri-voltage (12/24/120V) models.
• Wall mount and floor mount configurations available.

Arm Type Details

This unit is configured with a low-profile armature, which mounts to the door face and makes contact with the wall-mounted electromagnet. The reduced projection keeps the assembly close to the door surface for a discreet installation while maintaining a secure hold.