50kg Electromagnetic Fire Door Holder Wall Mount – DC 12V/24V
50kg Electromagnetic Fire Door Holder Wall Mount – DC 12V/24V
50kg Electromagnetic Fire Door Holder – Wall Mount Doorstop
Keep interior and smokeproof doors securely open with this heavy-duty electromagnetic door holder from Asia-Teco. Rated at 50 kg (110 lbs) holding force, 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.
Key Features
- 50 kg / 110 lb holding force — keeps doors open reliably under normal conditions
- Dual-voltage operation — 12V DC or 24V DC (±10%), fully adjustable to suit your access-control system
- Automatic fail-safe release — power interruption instantly releases the door, supporting fire-safety and emergency-egress requirements
- Compact wall-mount design — 80 × 80 × 40 mm footprint fits neatly on door frames and walls without obstructing foot traffic
- Durable finishes — high-temperature paint shell with zinc-plated armature resists corrosion and heat
- Wide operating range — functions from −10 °C to +55 °C (14–131 °F) and up to 90% relative humidity
- Compatible with single & double smokeproof doors — a versatile solution for all common interior door configurations
- Low power draw — 140 mA at 12V / 70 mA at 24V keeps energy costs minimal
Specifications
| Model | F31 |
| Dimensions | L80 × W80 × H40 mm |
| Holding Force | 50 kg (110 lbs) |
| Voltage | 12V / 24V DC ± 10% (Adjustable) |
| Current Draw | 12V / 140 mA | 24V / 70 mA |
| Operating Temp. | −10 °C to +55 °C (14–131 °F) |
| Surface Temp. | ≤ +20 °C |
| Suitable Humidity | 0–90% relative humidity |
| Shell Finish | High-Temperature Paint & Zinc |
| Armature Finish | Zinc |
| Weight | 0.85 kg |
| Country of Origin | Made in China |
Fire Safety & Building Code Guidance
Electromagnetic 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 & Procedures resources.
Frequently Asked Questions
Q: How does an electromagnetic door holder work?
A: 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.
Q: Is this door holder suitable for fire-rated and smokeproof doors?
A: 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.
Q: Can this unit be used with both 12V and 24V access-control systems?
A: 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.
Q: What hardware is required for installation?
A: 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.