Sargent 8273 LNL US26D Electric Mortise Lockset - Fail Secure, Unlocks Both Levers

The Sargent 8273 LNL is a high-security Grade 1 Heavy-Duty Electrified Mortise Lockset designed for high-stakes access control environments that require bidirectional traffic management. Built upon the industry-leading Sargent 8200 Series chassis, this lockset combines robust mechanical strength with sophisticated electronic control. The 8273 Fail Secure Function is the premier choice for research labs, high-value storage, and sensitive government installations where the door must remain locked on both sides during a power failure to maintain maximum security.

Comprehensive Electrified Control (73 Function - Fail Secure)

The 8273 function utilizes "Power-to-Unlock" logic for both the interior and exterior levers. This specialized configuration is essential for areas where movement must be restricted in both directions unless authorized by an electronic signal.

• Fail Secure Logic (Power ON, Unlocks Both Levers): In its default "Power OFF" state, both the exterior and interior levers are locked. Access from either side is only granted when power is applied via a card reader, biometric scanner, or remote release.
• Mechanical Key Override: Even without power, a physical key in the Sargent LA Keyway always retracts the latchbolt from the exterior, ensuring authorized personnel have a reliable mechanical backup.
• Universal Voltage Compatibility: The high-efficiency solenoid is engineered to operate on 12VDC or 24VDC, providing seamless integration with various security power supplies.
  
• Auxiliary Deadlatch: Features a stainless steel deadlatch that prevents "shimming" or unauthorized manipulation of the latchbolt when the door is closed.
  

Architectural LNL Trim & US26D Finish

The LNL trim configuration pairs the high-strength LN Escutcheon with the ergonomic L Lever, finished in a sleek US26D Satin Chrome.

• LN Escutcheon Plate: A heavy-duty wrought metal escutcheon that reinforces the door and protects the internal electrified components from tampering.
• L Lever Design: A modern, linear profile that is fully ADA compliant, allowing for effortless operation by authorized staff.
• 14 Million Cycles: Independently verified to withstand 14 times the cycle requirements for a Grade 1 rating, offering an unmatched total cost of ownership in high-frequency environments.

Critical Installation Recommendation: The QC8 Hinge

To ensure the long-term reliability of your electrified opening and simplify the installation process, it is highly recommended to use a QC8 Hinge with the Sargent 8273 LNL lockset.

• QC8 ElectroLynx® Integration: The McKinney QC8 Hinge utilizes an 8-pin connector to provide a concealed, protected power transfer from the frame to the lockset.
  
• Plug-and-Play Efficiency: The QC8 system eliminates the need for manual wire stripping or soldering, significantly reducing labor costs and the risk of wiring errors.
• Wire Protection: By housing the 8-wire harness within the hinge itself, the QC8 hinge prevents the wires from being pinched or fatigued during thousands of door cycles.

Key Product Features

• ANSI/BHMA Grade 1 Certified: The highest industry rating for mechanical durability and security.
• Electrified Fail Secure (F73): Bidirectional locking that defaults to "locked" during power loss to maintain perimeter integrity.
• Low Power Consumption: Optimized solenoid design draws minimal current, maximizing the capacity of your power supply.
• UL/cUL Listed: Rated for use on 3-hour fire-rated doors.
• Vandal-Resistant Chassis: Built with a 12-gauge heavy-duty wrought steel lock case that is zinc dichromate plated for corrosion resistance.

Technical Specifications

Ordering & Installation Information

The Sargent 8273 LNL is designed for precision integration into high-end security networks. For new construction, ensure the door and frame are pre-prepared for ElectroLynx® wiring. This hardware is fully compatible with Sargent High-Security Key Systems, including Degree® and Signature.

Ideal Applications

• High-Value Pharmaceutical Storage: Controlling bidirectional access to sensitive inventory.
• Data Centers & Server Rooms: Ensuring the door remains secured on both sides during power failures.
• Research & Development Labs: Managing strict entry and exit protocols with electronic scheduling.
• Government Facilities: Providing a Grade 1, fire-rated barrier for high-security zones.