Seco-Larm SD-991A-D1Q Mini No-Cut Electric Door Strike

The SECO-LARM SD-991A-D1Q is a 12 VDC mini no-cut electric door strike designed to convert compatible cylindrical locksets into electronically controlled entrances. Featuring fail-secure operation, a 1,000-pound static strength rating, and 250,000 factory-tested operating cycles, the strike remains locked when power is lost. Its non-handed design supports left- or right-hand doors, while a 280 mA current draw, non-polarized two-wire connection, and stainless steel keeper simplify integration with compatible access control equipment. The package includes stainless steel no-cut and silver aluminum low-cut strike plates for indoor metal or wood door frame installations.

SECO-LARM SD-991A-D1Q Mini No-Cut Electric Door Strike, 12 VDC, Fail-Secure

The SECO-LARM SD-991A-D1Q Mini Electric Door Strike provides electronically controlled access for compatible cylindrical door locking systems in commercial and institutional buildings. Manufactured by SECO-LARM under the ENFORCER product line, this compact strike features a fail-secure solenoid mechanism, stainless steel keeper, and reversible non-handed construction suitable for left-hand and right-hand door configurations. When activated by a compatible keypad, pushbutton, or access control system, the electric strike releases the door latch to permit authorized entry without mechanically retracting the existing lockset. Its shallow design accommodates many metal door frames, making it suitable for office entrances, interior commercial doors, reception areas, and other controlled-access locations requiring electronic entry management.

The SD-991A-D1Q operates at 12 VDC with a current draw of 280 mA and uses a simple, non-polarized two-wire electrical connection. Its fail-secure configuration keeps the strike locked when electrical power is removed, while energizing the internal solenoid permits release of the compatible cylindrical latch. SECO-LARM specifies a 1,000-pound (454 kg) static strength rating, 250,000 factory-tested operating cycles, and compatibility with a 1/2-inch (13 mm) latch throw. The stainless steel keeper provides resistance to mechanical wear during repeated operation. Unlike field-selectable electric strikes, the SD-991A-D1Q is specifically configured for fail-secure operation. Its electrical requirements should be matched to a regulated 12 VDC power source and appropriately rated access control switching equipment.

The SECO-LARM SD-991A-D1Q includes two interchangeable strike plate configurations to accommodate different door frame preparations. The SD-991SS-61Q/S stainless steel no-cut plate measures approximately 2-3/4 inches long, 1-1/8 inches wide, and 15/16 inch deep (70 28 24 mm). The included SD-991RA-61Q/A silver-colored aluminum low-cut plate provides an alternative for installations requiring additional latch clearance or limited frame modification. An optional SD-991RA-61Q/B bronze-colored low-cut plate is available separately for installations requiring a darker finish. The no-cut configuration is designed to fit compatible Timely interior door frames without additional cutting in typical installations, while other metal or wood frames may require limited preparation. The reversible design eliminates separate left-hand and right-hand strike models.

The SD-991A-D1Q is intended for indoor operation in temperatures ranging from 14 F to 120 F (-10 C to 49 C) and relative humidity from 0% to 85% non-condensing. Its compact housing installs within the door jamb using the supplied mounting screws, strike plates, splice connectors, and installation template. Installers can connect the strike to compatible digital keypads, request-to-exit pushbuttons, access control relays, and other appropriately rated switching devices. The manufacturer provides a one-year limited warranty against defects in materials and workmanship under normal service conditions. The SD-991A-D1Q offers a compact retrofit solution for cylindrical locksets where maintaining secure exterior entry during power loss is required. Door preparation, electrical wiring, latch engagement, and applicable emergency egress requirements must be verified before installation.