SDC 1091 Series - Spacesaver Right Angle Electric Mortise Bolt Lock, Failsafe

SDC Spacesaver® Right Angle Bolt Locks – Concealed Mortise Electric Locking Innovation

The SDC Spacesaver® Series of right angle bolt locks, including models like SDC 1091A and SDC 1190A, represents a patented breakthrough in electric locking technology. Designed and manufactured by SDC, these compact, concealed locks allow secure access control installations in virtually any standard door frame or lock stile through a simple mortise cutout—making them ideal for both new construction and retrofit applications.

With their concealed installation, enhanced security, and clean architectural aesthetic, Spacesaver® locks are trusted in commercial, industrial, and institutional facilities where durability and tamper resistance are paramount.

Key Features

• Right angle bolt projection allows space-efficient concealed mortise installation.

• Stainless steel bolt resists cutting and tampering.

• Specification grade solenoids deliver superior durability and performance over commercial-grade alternatives.

• Automatic relock ball switch:

  • Keeps bolt retracted when door is open.

  • Automatically projects the bolt when the door closes, securely locking it.

  • Field adjustable and bidirectional for use on both swinging and sliding doors.

• Freely rotating bolt further enhances tamper resistance.

• Field selectable dual voltage (12/24VDC).

• Built-in voltage and current spike protection.

• Includes power regulator for stable performance.

• Mounting tabs included for simplified installation.

Models with Override Option

• 1091AIDMR and 1291AHDMR models feature a mechanical release mortise cylinder override, allowing manual unlocking in the event of a power failure or system malfunction.

  • Note: Key cylinders sold separately.

Applications

• Ideal for narrow-profile aluminum doors, hollow metal frames, or glass storefronts.

• Perfect for security entrances, sliding door locks, and retrofits requiring clean concealed hardware.

CERTIFICATIONS
UL 10C Positive Pressure Fire Tests of Door Assemblies
ULC-S104 Standard Method for Fire Tests of Door Assemblies
ULC-S533 Egress Door Securing and Releasing Devices

RESOURCES

1090-1290-Datasheet.pdf (sdcsecurity.com)

INSTALLATION