SDC 210HV Concealed Direct Throw Electric Bolt Lock, Mortise, Fail-Secure

The SDC 210HV is a fail-secure concealed mortise electric bolt lock designed for commercial access control and compatible swinging or sliding door applications. Featuring a 1/2-inch-diameter stainless steel bolt, adjustable 1/2-inch bolt throw, and 628 dull aluminum finish, it provides positive mechanical locking that remains engaged when electrical power is removed. The continuous-duty solenoid operates on 12/24VDC, drawing 900mA at 12VDC or 450mA at 24VDC. Its 2-3/4-inch faceplate and adjustable bolt assembly support installation in compatible metal frames and specialized cabinet enclosures.

SDC 210HV Fail-Secure 12/24VDC Concealed Mortise Electric Bolt Lock

The SDC 210HV Conventional Direct Throw Electric Bolt Lock is a concealed electromechanical locking device engineered for commercial access control systems requiring positive mechanical bolt engagement and security during power interruptions. Manufactured by Security Door Controls (SDC), the 210HV belongs to the 100/200 Series of conventional mortise electric bolt locks and features a fail-secure mechanism that maintains the locked position when electrical power is removed. Its compact design is suitable for compatible swinging and sliding doors, specialty enclosures, utility cabinets, pharmacy cabinets, and custom equipment security applications. The lock incorporates a 628 dull anodized aluminum faceplate and mounts within a properly prepared metal frame or enclosure, providing concealed electronic locking without a conventional surface-mounted electromagnetic lock assembly.

The SDC 210HV features a 1/2-inch-diameter solid stainless steel locking bolt with a nominal 1/2-inch throw. The bolt rotates freely and is housed within an adjustable chamber that can extend forward up to 1 inch beyond the faceplate to accommodate wider door gaps or specialized mounting requirements. Its continuous-duty solenoid supports field-selectable 12VDC or 24VDC operation with a 10% voltage tolerance. Manufacturer specifications identify a current draw of 900mA at 12VDC and 450mA at 24VDC. The electrical assembly includes voltage and current spike protection to help protect connected access control circuitry. Installers configure the correct operating voltage through the manufacturer's specified solenoid wire connections rather than relying on automatic voltage detection.

Designed for electronic door and cabinet locking applications, the SDC 210HV can be integrated with compatible card readers, keypads, access control panels, remote release switches, and regulated DC power supplies. In its fail-secure configuration, electrical activation retracts the locking bolt, allowing the protected opening to be released, while the absence of power maintains the locked condition. The standard 210HV does not incorporate an automatic relock ball switch, so the control system and installation arrangement must provide the appropriate locking and release sequence. For applications requiring automatic bolt retraction while a door remains open and automatic locking upon closure, the related SDC 260HV includes an adjustable automatic relock switch. Separately specified door position contacts, including the SDC MC-4, can be incorporated where remote monitoring is required.

The SDC 210HV features a concealed mortise-mounted assembly with a faceplate measuring 2-3/4 inches high, 1-1/4 inches wide, and 1/4 inch thick. Its standard mortise strike measures 2-3/4 inches high by 1-1/4 inches wide by 1/8 inch thick, while the manufacturer's dimensional documentation identifies a 5-1/4-inch backset and an approximately 2-pound assembly weight. The lock is intended for installation in suitable metal frames and is not recommended for wood-frame applications. Field installation requires accurate alignment of the bolt and strike, sufficient internal mounting clearance, and wiring according to the selected 12VDC or 24VDC configuration. The SDC 210HV is a basic direct-throw bolt lock without integrated door position monitoring, automatic relocking, or mechanical key override. Its combination of fail-secure operation, adjustable stainless steel bolt, concealed installation, and dual-voltage compatibility provides a flexible locking component for commercial access control and specialized security enclosures.