SDC 1091AIDMR1HDB 1090 Series Concealed Mortise Bolt Lock, Failsafe, Door Mount, Dull Brass

Secure entry points without sacrificing aesthetics — the Security Door Controls 1091AIDMR1HDB 1090 Series Concealed Mortise Bolt Lock delivers discreet, specification-grade electric locking for commercial access control and surveillance-ready installations. The door-mount, dull-brass finished bolt is fully concealed in a compact mortise cutout, making it ideal for retrofit projects or new construction where appearance and tamper resistance matter. Designed for integrators, it supports field-selectable 12–24V DC power and manages an initial inrush of approximately 450mA, while the included power regulator and voltage spike protection safeguard sensitive monitoring and control electronics. Its stainless steel bolt and specification-grade solenoid provide long service life under heavy use, and the automatic, bidirectional relock ball switch ensures doors latch on closure for continuous security. Failsafe operation maintains safe egress in power loss scenarios, a critical consideration for emergency planning and building code compliance. Perfect for access control, security, and surveillance systems in office, healthcare, education, and retail facilities — contact your Security Door Controls supplier or add to your project quote to accelerate installation.

• Concealed mortise design hides the lock for a clean, professional appearance and reduces tampering for monitored access points
• Failsafe operation with automatic relock secures the door on closure while ensuring safe egress during power loss
• Heavy-duty stainless steel bolt and specification-grade solenoid for reliable performance in high-traffic commercial environments
• Field-selectable 12–24V DC input with built-in power regulator and spike protection simplifies wiring and protects control systems
• Bidirectional, field-adjustable relock ball switch and included mounting tabs speed installation in new builds or retrofits