Magnetic Door Releases & Electromagnetic Fire Door Holders
Magnetic door releases are essential life-safety components designed to hold fire-rated doors open during high-traffic hours and release them instantly upon signal from a fire alarm or smoke detector. These fail-safe devices ensure that smoke and fire are contained by allowing doors to self-close the moment power is interrupted. Our selection features industrial-grade magnets with high holding force, available in multiple mounting configurations to suit any architectural layout. From sleek recessed wall units to heavy-duty floor-mounted magnetic releases, these electromagnetic holders provide the perfect balance of building convenience and rigorous fire-code compliance.
Magnetic Releases by Application
Wall Mounted
Wall-mounted magnetic releases are the industry standard for corridor and stairwell doors. Available in various profiles, these units mount directly to the wall surface or electrical box. They are designed to align perfectly with the door-mounted armature, providing a secure hold that keeps pathways clear without obstructing foot traffic.
Floor Mounted
When walls are not available or are set too far back from the door, floor-mounted magnetic holders provide a rugged alternative. These units feature a vertical pedestal design, available in single or double-sided configurations to hold one or two doors simultaneously. They are ideal for large lobbies and open-concept commercial spaces.
Magnetic Releases by Mounting Type
Surface Mounted
Surface-mounted magnetic releases are the most versatile option for retrofit projects and industrial spaces. Because they mount directly onto the surface of the wall or a conduit box, they are perfect for masonry, concrete, or locations where "fishing" wires behind drywall isn't possible. These units are rugged, easy to install, and compatible with surface-run fire alarm wiring.
Recessed Mounted
For the most discreet installation possible, recessed magnetic door holders are tucked entirely inside the wall cavity. By housing the electromagnet within a specialized deep-back box, only the contact surface is exposed. This configuration is highly recommended for luxury architectural projects and narrow corridors where maximizing "clear width" is required by ADA accessibility standards.
Replacement Parts & Accessories
Maintaining your fire safety system requires precision components. We stock a full range of replacement parts, including:
- Armature Extensions: Available in various lengths to bridge the gap between the door and the magnet.
- Catch Disks: The swivel-design contact plates that ensure a flat, secure connection with the magnet.
- Armature Bases: The heavy-duty mounting plates that secure the catch disk to the door.
- Magnetic Release Armatures: Complete contact assemblies for new or repair installations
Flush Mounted
Flush-mounted magnetic releases are designed for a clean, streamlined look where the magnet sits nearly level with the wall surface. This mounting style uses a standard electrical box but utilizes a low-profile faceplate to minimize protrusion. It is the ideal choice for modern commercial hallways where you want to maintain a high-end aesthetic without sacrificing holding power or fire safety.
Voltage Selection & Wiring Guide
When selecting an electromagnetic door holder, you must match the device's requirements to your building's existing electrical infrastructure and fire alarm system outputs.
1. Common Voltage Options
Most modern magnetic releases are tri-voltage, meaning they can be field-wired to handle different power inputs, but you must verify your specific model's capabilities.
- 24VDC (Direct Current): The industry standard for modern fire alarm systems. Most FACPs provide 24VDC power, making this the most common choice for new construction. It is highly efficient and integrates directly with smoke detector relays.
- 24VAC (Alternating Current): Typically found in older systems or specialized HVAC-linked door control circuits.
- 120VAC (Line Voltage): Often used in retrofit applications where standard "house power" is readily available at the wall, but a centralized 24V power supply is not present. This requires a relay at the door to interface with the fire alarm system.
2. Wiring Configurations
- Fail-Safe Operation: All magnetic door releases are designed to be fail-safe. This means the magnet requires constant power to hold the door open. When the fire alarm is triggered, it cuts the power, causing the magnet to release and the door closer to shut the door.
- Polarity Matters: For 24VDC installations, ensure you observe correct polarity (positive to positive, negative to negative) to prevent damage to the electromagnetic coil.
- Wire Gauge (AWG): For long wire runs (especially in large corridors), use at least 18 AWG wire to prevent voltage drop, which can weaken the magnet's holding force.