Alarm Controls MCK-3-4 Steel Double Pole Double Throw Switch with Red and Green LED Indicator

Optimize field operations and streamline access control with the Alarm Controls by ASSA ABLOY MCK-3-4 steel key switch. Designed for demanding security and surveillance applications, this DPDT (double pole double throw) key switch delivers reliable switching and clear status feedback with its integrated red and green LED indicators. The heavy-gauge steel housing stands up to frequent use in control rooms, alarm panels, and perimeter monitoring stations, while the keyed mechanism minimizes accidental or unauthorized activation—ideal for alarm bypass, system reset, or zone control tasks.

Engineered for system integrators and facilities managers, the MCK-3-4 (manufacturer part number MCK-3-4) simplifies wiring and reduces installation time thanks to its dual-pole contacts and standard footprint. Built in the US, it meets commercial-grade expectations for durability and compatibility with legacy and modern access control systems. Choose this key switch when you need dependable performance, visible status indicators, and rugged construction to support critical security, surveillance, and monitoring workflows. Add the Alarm Controls MCK-3-4 to your control panel or security cabinet to improve operational clarity—order now for efficient deployment.

• Clear status visibility with integrated red and green LED indicators for quick on-site monitoring and remote surveillance verification.
• Robust steel construction for durable, long-life performance in high-traffic access control and security environments.
• DPDT (double pole double throw) switching provides flexible circuit control and easy integration with alarm panels and monitoring systems.
• Keyed operation reduces unauthorized use and ensures secure activation of critical functions like alarm bypass or emergency reset.
• US-made Alarm Controls MCK-3-4 unit built to OEM standards for reliable compatibility with existing control panels and security equipment.