Ubiquiti UA-LOCK-MAGNETIC-540KG Fail-Safe Magnetic Lock
Overview
The Ubiquiti UA-LOCK-MAGNETIC-540KG is an electromagnetic locking mechanism engineered for integration with UniFi Access control systems. At 540 kg (1,190 lbs) of holding force, this lock secures standard single-leaf and lighter double-leaf commercial doors without mechanical bolts, reducing friction wear and maintenance compared to traditional strike-plate designs. The 13.5 lb unit is fail-safe by design—power loss unlocks the mechanism, ensuring occupants can exit during electrical outages. This is not a marketing feature; it's a life-safety requirement in most jurisdictions. If your facility code mandates fail-safe egress, this lock meets that requirement out of the box.
Key Features
- 540 kg holding force: Sufficient for most office, lab, and institutional entry doors. If you're securing a heavy glass double-door or a high-traffic loading dock, you may need to step up to a heavier-duty latch mechanism—this spec is right-sized for standard commercial single-leaf access points.
- Fail-safe operation: De-energizes on power loss, releasing the armature plate. This prevents the panic scenario where a power outage traps occupants inside. Frame this against fail-secure locks, which lock harder during power loss—opposite behavior, opposite liability.
- Electromagnetic design: No moving parts, no mechanical shear pins. Reduces maintenance cycles and spare parts inventory across multi-site deployments.
- 13.5 lb weight: Light enough for standard aluminum or steel door frames. Heavier than a solenoid-only push mechanism, so verify your mounting surface can distribute the load—top-of-frame or header mounting is standard practice.
- UniFi Access Hub integration: The lock connects to the Access Hub, which decides lock state based on credential validation, time-of-day rules, and audit events. All lock transitions (lock, unlock, forced-entry attempts) log to the UniFi event database, supporting compliance audits and incident investigation.
- Centralized management: Deploy across ten sites, manage lock policy from one console. Schedule unlock times, revoke access, and pull audit reports without visiting each location.
Integration and Compatibility
The UA-LOCK-MAGNETIC-540KG requires the UniFi Access Hub as the control point. The hub validates credentials (card, mobile app, PIN, biometric) and energizes the lock's electromagnet only when access is granted. Power delivery to the lock runs through the hub's control circuit; verify your hub's power budget during design. Standard wiring follows fail-safe logic: the lock remains energized to hold the door, and loss of power releases it. If you're migrating from a mechanical key system or an older access control system, this integration streamlines credential management and removes keyed-door sprawl.
Installation Considerations
Mount the electromagnet at the top of the door frame; position the steel armature plate on the corresponding door surface. Proper alignment is critical—misalignment reduces holding force and increases wear on both surfaces. Allow 1/16 inch air gap for smooth operation. Power the lock through the Access Hub's control wiring, not a generic 12V transformer. Fail-safe wiring ensures the lock is normally energized, so a power cut or a cut wire releases the door—test this behavior during commissioning. If your door frame is concrete or composite, use heavy-duty expansion anchors rated for electromagnetic pull loads.
When to Choose a Different Model
If you need higher holding force (e.g., for a high-security server room or a heavy double-leaf fire-rated door), explore heavier electromagnetic locks in the broader access control market, or pair this lock with a mechanical deadbolt on the same door. If you're not deploying UniFi Access, this lock has no value—it requires the hub for any functionality. If egress law in your jurisdiction mandates fail-secure (lock stays locked on power loss), this is the wrong product; that scenario is rare but possible in secure facilities.
Frequently Asked Questions
Q: Does the UA-LOCK-MAGNETIC-540KG require a battery backup?
A: The lock itself does not—fail-safe design means it unlocks when power is lost, allowing egress. If you want the hub to remain powered during an outage so access control decisions continue, provision UPS or battery backup for the hub and network. The lock is not the bottleneck.
Q: Can I install the UA-LOCK-MAGNETIC-540KG on a glass door?
A: No. The armature plate requires a solid steel or aluminum surface. Glass doors require a surface-mounted strike plate or a separate mechanical lock paired with an electric release mechanism.
Q: What's the maximum distance between the electromagnet and armature plate?
A: Standard practice is 1/16 inch air gap. Exceeding this reduces holding force significantly. Verify alignment during installation.
Q: Does the UA-LOCK-MAGNETIC-540KG work with third-party access control systems?
A: No. It is designed for UniFi Access ecosystem only. The hub is the decision engine.
Q: How do I audit who unlocked a door and when?
A: All lock events (unlock, lock, tamper, forced-entry) are logged in the UniFi Access database with timestamp and credential used. Query the Access Hub logs or export via API.
Q: Is the 540 kg holding force enough for my application?
A: For standard commercial office and institutional doors, yes. If the door sees high traffic, frequent forced entries, or heavy wind load, test the lock under your specific conditions or consult the door manufacturer's maximum lock pull rating.
Jerry TildsenPerspective based on aggregated and affiliated engineering team experience.
The UA-LOCK-MAGNETIC-540KG is a straightforward electromagnetic door lock with one critical advantage: fail-safe operation is mandatory, not optional. At 540 kg holding force, you're covering standard commercial office and institutional doors without overbuying capacity. The 13.5 lb weight and electromagnet footprint fit most aluminum door frames, but alignment during installation makes or breaks performance—sloppy mounting kills holding force and accelerates armature-plate wear.
Technical Highlights:
- 540 kg holding force: Right-sized for single-leaf commercial doors and lighter double-leafs. Heavy-traffic or high-security doors may exceed this rating under sustained push; verify against your door manufacturer's max-load spec.
- Fail-safe electromagnet design: Power loss = unlock. No mechanical backup, no spring shear—just electromagnetic release. This is not an ornament; it satisfies life-safety code in almost all U.S. jurisdictions and most international standards.
- 13.5 lb unit, top-of-frame mount: Distributing that electromagnetic pull across the door header requires solid substrate (aluminum, steel angle iron, or reinforced wood). Drywall-only mounting will fail—this is a gotcha on renovation projects where the original frame is hidden.
Deployment Considerations:
- Alignment tolerance is tight—1/16 inch air gap between electromagnet and armature plate is standard. Exceeding this drops holding force noticeably and increases cycle wear. Invest in a laser level for initial setup.
- Power delivery runs through the UniFi Access Hub's control circuit. The hub must have capacity to energize the lock continuously—budget roughly 12–15W during normal operation. If the hub is undersized, the electromagnet will chatter or drop intermittently.
- Fail-safe wiring means the lock is normally energized to hold. A cut wire or a breaker trip opens the door. Test this scenario during commissioning—you want to confirm egress works without the hub.
Deploy the UA-LOCK-MAGNETIC-540KG where you're standardizing on UniFi Access across multiple sites and holding force of 540 kg covers your door types. Server rooms, lab access points, secure offices, and institutional entry doors are the sweet spot. If you need higher holding force, a heavier-duty electromagnetic or electromechanical lock (outside the UniFi ecosystem) may be necessary, but this lock removes mechanical key sprawl and integrates audit logging natively.
