The Hikvision DS-K4H250S is a professional-grade single-door electromagnetic lock (EM lock) from Hikvision's Pro Series access control lineup. Operating purely on electromagnetic force with no moving mechanical parts to jam or wear out, this fail-safe lock releases instantly upon power cut—making it ideal for emergency fire-exit compliance across offices, residential towers, retail stores, and industrial facilities in the UAE.
Expanded Key Features
Up to 280 kg (617 lbs) Static Linear Holding Force: Provides 272 kg to 280 kg (600–617 lbs) of static linear thrust (exceeding standard 250 kg class requirements), securing single-leaf wooden, glass, metal, and fireproof doors with a 90° swing angle.
Dual-Voltage 12 VDC / 24 VDC Operation: Easily configurable between 12 VDC at 500 mA (factory default) and 24 VDC at 250 mA via onboard jumpers, allowing seamless integration into both standard 12V door controllers and 24V multi-door commercial power supplies.
Door Lock Status Monitoring (NO/NC/COM) & Red/Green LED: Features a built-in dry-contact signal output (rated up to 3A) providing NO (Normally Open) output when locked and NC (Normally Closed) output when unlocked for live door-status tracking in iVMS-4200, paired with an onboard LED indicator (Green = Locked, Red = Unlocked).
Built-In Surge Protection (MOV) & Anti-Residual Magnetism: Equipped with an internal Voltage Dependent Resistor (MOV) to eliminate back-EMF voltage spikes and an anti-residual magnetism design so the door releases smoothly the instant power is cut.
Hard-Anodized Aldural Shell & Eco-Friendly Zinc Plating: Constructed with an abrasion-proof, hard-anodized electroplated aldural shell and an eco-friendly electroplated zinc lock body and armature plate, rated for continuous operation from -10°C to +55°C and up to 95% relative humidity.
