{"product_id":"50kg-electromagnetic-fire-door-holder-wall-mount","title":"50kg Electromagnetic Fire Door Holder Wall Mount – DC 12V\/24V","description":"\n\u003ch2\u003e50kg Electromagnetic Fire Door Holder – Wall Mount Doorstop\u003c\/h2\u003e\n\u003cp\u003eKeep interior and smokeproof doors securely open with this heavy-duty \u003cstrong\u003eelectromagnetic door holder\u003c\/strong\u003e from Asia-Teco. Rated at \u003cstrong\u003e50 kg (110 lbs) holding force\u003c\/strong\u003e, this wall-mount unit uses DC 12V\/24V power and automatically releases the door the moment the circuit is interrupted — making it ideal for fire-door and emergency-egress applications in offices, hospitals, hotels, schools, and commercial buildings.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e50 kg \/ 110 lb holding force\u003c\/strong\u003e — keeps doors open reliably under normal conditions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-voltage operation\u003c\/strong\u003e — 12V DC or 24V DC (±10%), fully adjustable to suit your access-control system\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAutomatic fail-safe release\u003c\/strong\u003e — power interruption instantly releases the door, supporting fire-safety and emergency-egress requirements\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact wall-mount design\u003c\/strong\u003e — 80 × 80 × 40 mm footprint fits neatly on door frames and walls without obstructing foot traffic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable finishes\u003c\/strong\u003e — high-temperature paint shell with zinc-plated armature resists corrosion and heat\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide operating range\u003c\/strong\u003e — functions from −10 °C to +55 °C (14–131 °F) and up to 90% relative humidity\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible with single \u0026amp; double smokeproof doors\u003c\/strong\u003e — a versatile solution for all common interior door configurations\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow power draw\u003c\/strong\u003e — 140 mA at 12V \/ 70 mA at 24V keeps energy costs minimal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003eF31\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003eL80 × W80 × H40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e\u003cstrong\u003eHolding Force\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e50 kg (110 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e12V \/ 24V DC ± 10% (Adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e\u003cstrong\u003eCurrent Draw\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e12V \/ 140 mA  |  24V \/ 70 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e\u003cstrong\u003eOperating Temp.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e−10 °C to +55 °C (14–131 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e\u003cstrong\u003eSurface Temp.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e≤ +20 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e\u003cstrong\u003eSuitable Humidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e0–90% relative humidity\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e\u003cstrong\u003eShell Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003eHigh-Temperature Paint \u0026amp; Zinc\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e\u003cstrong\u003eArmature Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003eZinc\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e0.85 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd\"\u003eMade in China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFire Safety \u0026amp; Building Code Guidance\u003c\/h3\u003e\n\u003cp\u003eElectromagnetic door holders are an important part of passive fire-protection strategies in commercial and residential buildings. For guidance on fire door requirements and building safety standards, visit the U.S. Consumer Product Safety Commission (CPSC) and OSHA's Evacuation Plans \u0026amp; Procedures resources.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: How does an electromagnetic door holder work?\u003c\/h4\u003e\n\u003cp\u003eA: The unit uses an electromagnet to hold a ferromagnetic armature plate attached to the door. While power is supplied (12V or 24V DC), the magnet maintains a strong 50 kg \/ 110 lb grip that keeps the door open. When power is cut — such as during a fire alarm activation — the magnetic field collapses instantly, releasing the door so it can close under its own spring mechanism.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this door holder suitable for fire-rated and smokeproof doors?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The Asia-Teco F31 is specifically designed for single and double smokeproof interior doors, making it well-suited for fire-door applications where automatic release on power failure is required.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this unit be used with both 12V and 24V access-control systems?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The door holder supports 12V DC (140 mA) and 24V DC (70 mA), with a ±10% tolerance, making it compatible with most standard access-control and fire-alarm panels available today.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What hardware is required for installation?\u003c\/h4\u003e\n\u003cp\u003eA: The unit is a wall-mount design. You will need standard mounting screws appropriate for your wall material, a DC power supply (12V or 24V), and low-voltage wiring to connect to your control panel. No specialist tools are required beyond a drill and screwdriver.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"How does an electromagnetic door holder work?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The unit uses an electromagnet to hold a ferromagnetic armature plate attached to the door. While power is supplied (12V or 24V DC), the magnet maintains a strong 50 kg \/ 110 lb grip that keeps the door open. When power is cut — such as during a fire alarm activation — the magnetic field collapses instantly, releasing the door so it can close under its own spring mechanism.\"}}, {\"@type\": \"Question\", \"name\": \"Is this door holder suitable for fire-rated and smokeproof doors?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. 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