Sdc EH3024120A Surface Electromagnetic Door Holder 24V

Product Description

The SDC - SECURITY DOOR CONTROLS EH3024120A is a surface-mount electromagnetic door holder designed to hold open fire-rated and smoke-control doors in commercial and institutional buildings. Operating on 24 volts AC or DC as well as 120 volts AC, this unit provides flexible power compatibility across a wide range of access control and fire alarm panel configurations. It releases the door automatically upon loss of power or activation of a fire alarm signal, allowing the door to close and latch under its own closer force. Electromagnetic door holders of this type are installed by licensed electricians and security or access control technicians working in accordance with NFPA 80 and local fire codes.

The EH3024120A mounts directly to a wall or floor surface without requiring mortising or frame modification, making it suitable for retrofit and new construction applications. It is commonly used on corridor fire doors, stairwell entries, and smoke-barrier doors in commercial office buildings, healthcare facilities, schools, and similar occupancies where doors must remain open during normal operations but close automatically during a fire event. The surface-mount design reduces installation time compared to concealed or mortised alternatives.

Key Features

• Dual-voltage input accepts 24V AC or DC and 120V AC for broad power supply compatibility
• Surface-mount configuration requires no frame modification or mortising
• Fail-safe electromagnetic release allows door to close on power loss or alarm activation
• Designed for use in fire-rated door hold-open applications per applicable fire codes
• Sold as a single unit (EA quantity of 1)

Compatibility

Designed as an OEM-style surface electromagnetic door holder for fire-rated and smoke-control door assemblies in commercial and institutional installations where 24V AC, 24V DC, or 120V AC power is available from a fire alarm control panel or dedicated power supply.

Installation Notes

Installation should be performed by a licensed electrician or qualified access control technician in compliance with NFPA 80, NFPA 72, and applicable local codes. Disconnect and lock out all power to the fire alarm panel circuit and door holder supply before beginning wiring. Verify that the door assembly is equipped with a properly rated door closer, as the holder does not provide closing force on its own. Do not bypass or defeat the fail-safe release function during testing.