Sdc EH2024120A Semi-flush Electromagnetic Door Holder

Product Description

The SDC Security Door Controls EH2024120A is a semi-flush electromagnetic door holder designed to hold fire doors and corridor doors open in commercial and institutional buildings. It mounts to the door face and strikes the wall or frame with a low-profile flush-mount profile that keeps the unit out of the traffic path. The EH2024120A operates on dual voltage input, accepting either 24 volts AC or DC as well as 120 volts AC, giving installers flexibility to match existing building power infrastructure without an external transformer. When power is interrupted by a fire alarm signal or manual release, the electromagnetic hold is released and the door closes under its own closer.

This door holder is suited for use on fire-rated corridor doors, stairwell doors, and smoke partition doors in commercial, healthcare, educational, and multi-family residential applications. It is typically installed where a door must remain open for traffic flow during normal operations but must be released automatically during a fire or life-safety event. The dual-voltage design makes it compatible with both low-voltage fire alarm control panels and standard 120-volt building circuits, reducing the need for additional power conversion hardware on retrofit or new construction projects.

Key Features

• Dual-voltage operation: accepts 24 volts AC or DC and 120 volts AC
• Semi-flush mounting profile minimizes protrusion into the door swing path
• Electromagnetic hold releases automatically on power interruption for fail-safe door closure
• Single-unit quantity per package for straightforward procurement
• Suitable for fire door hold-open applications in life-safety code-compliant installations

Compatibility

Designed as an OEM-style electromagnetic door holder for semi-flush installation on fire-rated and smoke-partition doors in commercial and institutional construction. No specific compatible model numbers were provided in the product data.

Installation Notes

Installation should be performed by a licensed electrician or qualified low-voltage systems technician in accordance with NFPA 70 (NEC) and applicable local fire and life-safety codes. Disconnect and lock out all power circuits before wiring the unit. The door holder must be connected to the fire alarm control panel release circuit so that power is interrupted upon alarm activation, allowing the door to close freely. Verify that the door is equipped with a properly rated door closer before completing the installation.