Introduction to the Hikvision DS-K4H250D and its key features
The Hikvision DS-K4H250D Double‑Door Magnetic Lock (Maglock) is a Pro‑Series access control device engineered for commercial and industrial applications where a double leaf door needs robust, reliable holding force. Packaged in a compact hard‑anodised aluminium body with electroplated zinc internal components, the DS-K4H250D provides two independent linear electromagnetic elements — each rated up to 272 kg (599.8 lb) — and selectable 12/24 VDC operation for flexible installation. Its LED lock status indicator, built‑in surge protection and dry contact signal outputs make it easy to monitor and integrate with access control panels and alarm systems.
Detailed specifications and benefits
The DS-K4H250D combines practical engineering with installer‑friendly features. Below are its core technical specifications followed by the benefits those specifications deliver in real installations.
- Model:DS-K4H250D
- Holding force:272 kg × 2 linear elements (one per door leaf)
- Voltage:Selectable 12 VDC or 24 VDC
- Current draw:12 VDC — 500 mA per element (1.0 A combined); 24 VDC — 250 mA per element (0.5 A combined)
- Signal output:Dry contact (NO/NC/COM), maximum switching 3 A
- Indicator:LED — Red (unlocked) / Green (locked)
- Surge protection:Built‑in MOV for transient suppression
- Material:Hard anodised shell; zinc lock body and armature plate with electroplating
- Dimensions:Lock body 480 × 49 × 25.5 mm; Armature plate 180 × 38 × 11 mm
- Weight:Approximately 4.2 kg
- Operating conditions:−10 °C to +55 °C; 0–95% RH
- Suitable doors:Single or double leaf doors — wood, glass, metal, fire‑rated (confirm local regulations for fire door usage)
Benefits explained:
- High holding force, double coverage:Each linear element is rated to 272 kg, so the unit is suited to heavy or high‑traffic double doors where security is critical. Two independent elements mean each leaf is secured individually, enhancing resistance to forced entry.
- Selectable voltage:The ability to operate at 12 VDC or 24 VDC simplifies integration with existing power supplies and access control systems. Note the combined current draw when planning power budgets (1 A at 12 V DC; 0.5 A at 24 V DC for both elements).
- Visual lock status:The integrated LED gives instant at‑a‑glance confirmation for maintenance staff and security personnel — red for unlocked, green for locked — reducing troubleshooting time.
- Integration ready:Dry contact outputs (NO/NC/COM) and built‑in MOV surge protection enable direct connection to access controllers, alarm panels and monitoring systems while protecting the electronics from transient spikes.
- Durability:Hard anodised external finish and electroplated zinc components provide abrasion resistance and corrosion protection for long service life in demanding environments.
Installation notes and safety considerations
To get the best performance from the DS-K4H250D, observe these practical guidance items:
- Confirm the combined current draw for your chosen voltage and size your power supply accordingly (1.0 A combined at 12 VDC; 0.5 A combined at 24 VDC). Allow headroom for wiring losses and any additional connected devices.
- Maglocks are electromagnetic devices and typically release when power is removed (fail‑safe behavior). Verify the required fail‑state for fire and life‑safety regulations in your jurisdiction — some applications demand fail‑secure hardware instead.
- Installation should be carried out by a qualified installer or electrician and follow local building and fire codes. For fire‑rated doors, confirm compatibility with the door manufacturer and local approvals.
- Check certification (CE/UKCA or other local approvals) with the manufacturer or supplier prior to installation — the supplied product record does not include certification confirmation.
- When stock is unavailable (stock shown as 0 in the provided record), display expected lead times and the warranty/returns policy on product pages to reduce buyer uncertainty.
Use cases and scenarios where the DS-K4H250D excels
The DS-K4H250D is designed for installations where a double leaf door must be secured with high holding force while remaining easy to monitor and integrate. Typical scenarios include:
- Commercial entrances:Retail centres, office lobbies and corporate facilities where paired doors require a neat, concealed locking solution and reliable holding strength during business hours.
- Industrial and warehouse doors:Loading bay entryways or internal access points where doors are heavy and subject to mechanical stresses — the maglock’s linear thrust elements provide strong, even clamping force across each leaf.
- High‑security rooms:Server rooms, equipment stores and utility rooms with double leaf doors that need to be secured to prevent unauthorised access while being monitored by an access control system.
- Glass and frameless doors:Where a compact electromagnetic solution with an anodised appearance offers a discreet, secure option without extensive frame modification.
- Retrofit upgrades:Facilities upgrading from simple mechanical locks to electronic access control often choose maglocks for ease of installation and integration with existing alarm and access panels.
Because the DS-K4H250D provides independent locking elements for each leaf, it is particularly useful in configurations where one leaf is often used for passage and the other remains secured, or where interlocking door control is required.
Comparisons with similar products and alternatives
When choosing an access locking solution, it helps to compare the DS-K4H250D with other maglocks and alternative locking technologies.
- Single‑door maglocks vs. double‑door maglocks:Single‑door maglocks are sized for one leaf and are simpler to wire; double‑door maglocks like the DS-K4H250D integrate two elements into one compact unit, saving door frame space and providing a consistent aesthetic across both leaves. The double‑element approach also simplifies procurement and ensures matched holding force and indicators for both leaves.
- Fixed‑voltage models vs. selectable voltage:Some maglocks are fixed to either 12 VDC or 24 VDC. The DS-K4H250D’s selectable voltage increases flexibility in installations where the available supply may vary or where installers want to standardise on a single product for multiple sites.
- Maglocks vs. electric strikes:Maglocks generally offer higher holding force and simpler installation on certain door types (e.g., glass). They require continuous power to remain locked (fail‑safe) and may not be suitable where fail‑secure operation is mandated. Electric strikes can offer fail‑secure options and are often preferred for fire doors or where mechanical locking of the latch is required. The right choice depends on safety regulations and the desired fail state.
- Built‑in features:The DS-K4H250D’s LED status indicator, dry contact outputs and MOV protection are features often found on higher‑end maglocks. Lower‑cost models may omit these conveniences, requiring additional monitoring relays or external surge protection.
Customer testimonials and installer feedback
At the time of writing, there are no specific customer reviews attached to the supplied product record. To help prospective buyers, below are common themes that installers and security professionals typically report about Pro‑Series double‑door maglocks with similar feature sets:
- Positive feedback:Installers appreciate the selectable voltage (fewer SKUs to stock), the clear LED status for easy troubleshooting, and the compact dual‑element design that simplifies mounting on paired doors. The built‑in surge protection is often cited as a welcome addition for sites with unreliable power.
- Considerations raised:Installers frequently remind buyers to confirm fire‑door compatibility and local code compliance before fitting a maglock. They also emphasise planning for power supply headroom and using correct cabling to minimise voltage drop over long runs.
If you require real end‑user testimonials, request sample references from your supplier or consult the manufacturer’s product page and authorized reseller listings for verified customer reviews.
Conclusion: Why the Hikvision DS-K4H250D is a strong choice
The Hikvision DS-K4H250D double‑door maglock is a capable, installer‑friendly solution for securing paired doors in commercial, industrial and institutional environments. With two 272 kg holding elements, selectable 12/24 VDC operation, LED status indication, dry contact outputs and built‑in surge protection, it combines the features installers need for reliable access control integration in a compact package. Its durable materials and neutral finish make it suitable for a wide range of door types and aesthetic requirements.
When evaluating the DS-K4H250D, confirm power supply sizing, local certification and fire‑safety requirements, and display expected lead times and warranty details to buyers if stock is limited. Priced competitively (suggested price: $149.99), it presents a practical option for security contractors and facilities managers seeking a robust double‑door electromagnetic locking solution. For detailed wiring diagrams, certification information and installation instructions, consult the official Hikvision datasheet and engage a qualified installer.
