Industrial DH24120SPC Electromagnetic Door Holder Release

Industrial DH24120SPC Electromagnetic Door Holder Release is a surface‑mount fire‑door hold/open device with a backbox, designed to keep a door latched open under normal conditions and release when a fire alarm signal is received. The unit is specified for 24 V DC/AC or 120 VAC operation and is finished in powder‑coated chrome, with a compact, robust metal construction suitable for commercial and institutional installations. At 24 V, the hold current is low (approximately 15 mA, depending on supply), helping to minimize overall power draw in larger deployments. When energized, it maintains the door in an open position; upon a compatible alarm signal, the magnet releases and allows the door to close to aid smoke containment. The DH24120SPC is designed to integrate with standard fire‑alarm control systems and door hardware layouts, offering low residual magnetism to ensure reliable release even with low‑pressure closer mechanisms. This configuration, including the backbox, supports a clean installation in hallways, entrances, and high‑traffic egress points where code‑compliant door control is essential and quick, predictable releases are critical for safe evacuation. With its chrome finish and surface‑mount footprint, it pairs with a wide range of architectural hardware while delivering dependable performance in demanding environments.