Alarm Controls MCK-3-2 SPDT Alternate Action Switch

Bring reliable, tamper-resistant access control to critical entry points with the Alarm Controls by ASSA ABLOY MCK-3-2 SPDT alternate action keyswitch. Designed for security professionals, this keyswitch delivers dependable alternate-action control for doors, gates, and control panels while providing visible status via a green LED that operates on 12 or 24 VDC. The MCK-3-2 mounts on a narrow 1-3/4" 302 stainless steel wallplate for a low-profile, vandal-resistant installation suited to commercial and institutional environments.

With SPDT alternate action switching rated at 4A @ 28 VDC and 8" colored leads for fast low-voltage connections, this keyswitch integrates easily into access control, alarm, and monitoring systems. It accepts a standard 1-1/8" mortise cylinder (sold separately) so you can choose keyed-different or keyed-alike options to match your security plan. Supplied with tamper-proof and slotted screws and built from UL/CUL recognized components, the MCK-3-2 supports code-conscious deployments.

Specify the MCK-3-2 when you need a rugged, easy-to-service keyswitch for access control, surveillance integration, or perimeter monitoring. Contact your distributor to order or discuss custom silkscreening and cylinder options.

• Provides tamper‑resistant, alternate-action access control for secure entry points, reducing unauthorized access and simplifying lock management.
• Integrated green LED (12/24 VDC) gives immediate visual status for monitoring and troubleshooting in security and surveillance systems.
• Durable 302 stainless steel narrow wallplate withstands commercial wear for clean installations in high-traffic areas.
• SPDT switch rated 4A @ 28 VDC supports low-voltage access control circuits and easy integration with alarm and monitoring panels.
• Accepts standard 1-1/8" mortise cylinder for keyed control and flexible master/keying options; UL/CUL recognized components ensure code-friendly deployment.