Sdc MC-4MU Magnetic Switch Spdt Satin Stainless

Product Description

The SDC - SECURITY DOOR CONTROLS MC-4MU is a single-pole double-throw (SPDT) magnetic switch designed for door position monitoring in access control and security applications. Measuring 1.25 inches by 4.875 inches, this switch detects door open and closed states and sends a signal to the access control panel or alarm system. The 630 finish designates a satin stainless steel surface treatment, making the unit suitable for both interior and exterior door hardware installations. Licensed security and low-voltage technicians are the primary installers of this device.

The MC-4MU is used in commercial and institutional access control systems where reliable door position sensing is required. It is appropriate for use on doors monitored by access control panels, burglar alarm systems, or building automation systems that require a dry-contact status signal. The SPDT configuration provides both normally open and normally closed circuit options, giving installers flexibility in how the switch integrates with the control system. Typical installations include hollow metal doors, aluminum storefront doors, and similar commercial door frames.

Key Features

• SPDT contact configuration supports both normally open and normally closed wiring options
• 1.25 x 4.875 inch form factor sized for standard commercial door frame mortise or surface mount applications
• 630 satin stainless finish resists corrosion and blends with commercial door hardware
• Sold as a single unit for individual door installations
• Compatible with standard low-voltage access control and alarm panel inputs

Compatibility

Designed as an OEM-style replacement or new-installation magnetic switch for commercial access control and security alarm systems requiring an SPDT dry-contact door position sensor.

Installation Notes

Installation should be performed by a licensed low-voltage or alarm technician in accordance with applicable local codes and NFPA 731 standards. De-energize the access control panel circuit before wiring the switch contacts. Verify the door gap clearance is appropriate for the magnetic switch actuation range before finalizing mounting position. Do not exceed the switch rated voltage or current limits as specified in the manufacturer data sheet.