Dahua DHI-ASF280A Electromagnetic Lock – Access Control System for Doors and SMB Security

Dahua DHI-ASF280A is a professional electromagnetic lock with a 280 kg holding force, designed for integration into access control systems on wooden, metal, glass, and fire-rated doors. Commonly installed in office buildings, public institutions, and commercial facilities where card, code, or biometric access control requires a reliable and durable electromagnetic locking element.

The 280 kg holding force secures doors under moderate to high traffic conditions, while dual 12VDC / 24VDC power input ensures compatibility with existing access control panels and controllers. MOV protection against reverse current prevents damage to connected electronic components when the lock releases, extending the operational lifespan of the full installation. The aluminium alloy housing withstands repeated mechanical stress under continuous cycling use.

Electromagnet dimensions of 250 × 47 × 26 mm and an armature plate of 180 × 38 × 11 mm allow mounting on narrow frames and standard door profiles without significant structural modification. An operating temperature range of -30°C to +60°C covers installations in environments with significant thermal variation — exterior entrances, warehouses, and industrial spaces. A total weight of 2 kg simplifies handling and single-technician installation.

Recommended for security and access control system integrators, fire safety system installers, and technical staff equipping commercial, institutional, and industrial facilities. Compatibility with fire-rated doors makes it suitable for installations subject to fire safety regulations, where electromagnetic locking must release automatically upon activation of the fire alarm system.