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S4A-40 Emergency Door Holder

Dual Voltage Operation: Compatible with both 12V and 24V power sources for easy integration into fire safety and access control installations.
Emergency Door Release: Securely holds doors open under normal conditions and automatically releases them during emergencies or power interruptions.
Compact Armature & Magnet Design: Precise magnetic parts measuring 61×50 mm paired with a 61×52 mm mounting plate for stable door holding.
Durable Metallic Housing: Constructed from high-quality metals to withstand long-term commercial and industrial use.
Fire Safety Compliance: Ideal for installation on fire doors, emergency exits, and safety barriers in commercial buildings.
  • Brand:

    S4A
  • Item NO.:

    S4A-40
  • Specifications

S4A-40 Emergency Door Holder


The S4A-40 is an emergency door holder engineered for automatic release and secure holding of fire and emergency exit doors. Operating on a dual 12V/24V power supply, it features a durable magnetic assembly (61×50 mm) and armature plate (61×52 mm) to deliver reliable door retention and instant release when integrated with fire alarm or access control systems.


Parameter Specification
Model Number S4A-40
Product Name Emergency Door Holder
Operating Voltage 12V / 24V DC
Magnetic Parts Size 61 × 50 mm
Armature Plate Parts Size 61 × 52 mm
Application Fire Doors, Emergency Exits, Access Control Systems

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