BRK SA520B 120VAC/DC Wireless Interconnect Smoke Alarm-Bridge Unit

Delivering seamless life-safety integration for retrofit and renovation projects, the BRK Electronics SA520B bridge smoke alarm converts mixed systems into a unified detection network. This bridge unit links OneLink wireless photoelectric alarms with existing hardwired detectors using secure 915 MHz RF interconnect (65,000 security codes), so alarms on different floors sound together and occupants receive faster notification. Powered by 120VAC hardwire with alkaline battery backup and using photoelectric sensing and Optipath 360 technology, the SA520B provides reliable detection and continuous monitoring even during power interruptions.

Designed for contractors and facility managers, the SA520B reduces installation time with perfect-mount alignment and a single-button test/silence function. Spread-spectrum horn tones improve audibility for aging listeners, while silence features and an alarm latch minimize nuisance events and simplify troubleshooting. UL217 listed and backed by a 10-year limited warranty, this BRK smoke alarm bridge supports code-compliant upgrades for commercial, multifamily, educational and institutional properties.

Add the SA520B to your security, monitoring and surveillance-ready life-safety plan to achieve dependable, whole-building smoke detection—contact sales to specify units for your next retrofit.

• Simplifies retrofit and renovation projects by wirelessly bridging new OneLink alarms with existing hardwired detectors for building-wide alerts
• Secure 915 MHz RF interconnect with 65,000 security codes ensures reliable, interference-resistant communication across floors
• 120VAC hardwired operation with alkaline battery backup maintains continuous monitoring and protection during power loss
• Photoelectric sensor with Optipath 360 technology delivers broader smoke coverage and faster detection of smoldering fires
• Installer-friendly perfect-mount, single-button test/silence and alarm latch reduce install time and service callbacks
• UL217 listed with a 10-year limited warranty for code compliance and long-term reliability in commercial and multifamily applications