Sdc 55-AU Heavy Duty Cylindrical Electric Strike

Product Description

The SDC Security Door Controls 55-AU is a heavy duty cylindrical electric strike designed for commercial and institutional access control applications. It provides fail-secure or fail-safe locking by releasing the keeper when an electrical signal is received, allowing the door to open without retracting the latch manually. At 4.875 inches in overall length, this strike fits standard cylindrical lockset preparations and is rated for high-cycle, high-traffic installations. Security hardware installers and licensed low-voltage access control technicians are the primary trades who specify and install this unit.

The 55-AU is suited for commercial doors in office buildings, schools, healthcare facilities, and institutional environments where electric latch retraction or electric strike access control is required. It is designed to work with standard cylindrical locksets in a typical door-frame application. This strike is sold as a single unit and is appropriate for new installation or as a direct replacement in existing electric strike cutouts of the same frame preparation size.

Key Features

• Heavy duty cylindrical electric strike rated for high-traffic commercial applications
• 4.875-inch overall length fits standard cylindrical lockset door prep cutouts
• Electric latch release allows access without manual latch retraction
• Designed for integration with access control systems, intercoms, and credential readers
• Sold as a single unit for straightforward specification and ordering

Compatibility

Designed as an OEM-style replacement or new-install electric strike for commercial doors equipped with standard cylindrical locksets and compatible electric strike frame cutouts.

Installation Notes

Installation should be performed by a licensed access control or low-voltage technician familiar with electric hardware and applicable local codes. Disconnect all power to the access control circuit before wiring or replacing the strike. Verify that the door frame preparation and strike cutout dimensions match the 55-AU before installation. Confirm power supply voltage matches the strike specifications prior to energizing the circuit.