Nascom N205A/STSD Overhead Door Standard SPDT Switch with Shape Magnet, 24"Armored Cable, Silver

Keep overhead doors secured and monitored with the Nascom N205A/STSD, a commercial-grade magnetic contact designed for demanding security and surveillance applications. This overhead door switch (magnetic contact) uses Nascom’s NO DEAD SPOT™ technology to prevent nuisance alarms from side-to-side door movement, giving you dependable closed-loop protection for access control and monitoring systems. The N205A/STSD features a SPDT contact configuration and a wide 2.25" standard gap to accommodate large commercial and industrial doors, while the AlNiCo 5 magnet ensures consistent operation over time. Installers benefit from robust, extruded anodized aluminum construction and a 24" armored cable lead that guards wiring against abrasion and impacts—reducing maintenance and downtime. UL634 listing confirms compliance with industry safety standards, making this unit a trustworthy choice for perimeter security, dock monitoring, and integrated alarm systems. For reliable door position detection that integrates with security, surveillance, and access control platforms, choose the Nascom N205A/STSD. Contact sales or order now to specify it for your next commercial door monitoring project.

• Eliminates false alarms from side-to-side door movement with NO DEAD SPOT™ technology for reliable monitoring
• Built for heavy-duty environments: anodized aluminum housing and 24" armored cable reduce damage and service calls
• Wide 2.25" gap and AlNiCo 5 magnet deliver consistent SPDT contact performance on large overhead doors
• UL634-listed, commercial-grade construction supports security and surveillance systems for warehouses and loading docks