Alarm Controls MCK-2-3 Mortise Cylinder Key Switch Narrow, Stainless Steel, Green LED

Built for reliable access control in commercial and institutional environments, the Alarm Controls by ASSA ABLOY MCK-2-3 mortise cylinder key switch provides a compact, durable solution for secure entry and monitoring. This key switch features a stainless-steel plate that accepts standard 1-1/8" mortise cylinders, enabling quick retrofits and consistent aesthetics across doors and panels. With only 1.25" depth behind the plate, it suits narrow frames, server rooms and tight control enclosures where space is at a premium. The MCK-2-3 offers dependable switching with contacts rated at 4A @ 28VDC and color-coded leads for straightforward wiring, while the integrated green LED operates on 12 or 24V AC/DC to provide clear visual status for security personnel and automated monitoring systems. Designed to integrate smoothly with access control, surveillance and alarm platforms, this key switch reduces installation time and maintenance while improving operational clarity. Ideal for commercial doors, data centers and panel-mounted security stations—add the MCK-2-3 to your security toolkit or contact your supplier to specify it for your next access control project.

• Durable stainless-steel faceplate delivers corrosion resistance and a professional finish for long-lasting, low-maintenance installations
• Fits standard 1-1/8" mortise cylinders for seamless compatibility with existing hardware and fast retrofits
• Slim 1.25" depth behind the plate saves space in narrow doors, frames and control enclosures
• Color-coded leads and robust 4A @ 28VDC switch contacts ensure reliable switching for access control and alarm systems
• Integrated green LED works on 12 or 24V AC/DC for clear visual status in security and monitoring applications
• Easy integration with surveillance, access control and physical security systems to simplify installation and operation