SDC 480-1B Narrow Mullion Surface Box

Achieve fast, low-impact installations of access control and monitoring devices with the Security Door Controls SDC 480-1B Narrow Mullion Surface Box. This mounting accessory from the SDC 480 series delivers a secure, low-profile surface-mount solution for slim mullions, allowing integrators to mount electric strikes, door contacts, card readers and surveillance sensors without cutting or recessing frames. The unit is supplied as manufacturer part number 480-1SB and serves as a direct replacement for model 400-1B, making retrofits straightforward and reducing project downtime. Built for durability in high-traffic environments, the narrow mullion box keeps wiring organized and tamper-resistant while preserving aesthetics—critical for security, monitoring, and surveillance installations. Ideal for facility managers and security integrators, the SDC 480-1B streamlines labor, improves system reliability, and supports a wide range of access control components. Order the SDC Narrow Mullion Surface Box today or contact our sales team for compatibility and volume pricing to speed your next security or surveillance deployment.

• Low-profile narrow design for clean, professional installations on slim mullions
• Surface-mount construction reduces labor and eliminates the need to recess frames
• Secure mounting for access control, electric strikes, readers and surveillance sensors
• Compatible with SDC 480 series; manufacturer part number 480-1SB for easy specification
• Direct retrofit replacement for model 400-1B to simplify upgrades and minimize downtime