The Siemens FS140 FirstSurge™ Pro Surge Suppressor is a premium whole-home surge protection device designed to safeguard residential electrical systems from damaging voltage spikes. With an industry-leading 140kA surge capacity, this unit provides robust protection for sensitive electronics, appliances, and smart home systems.

Engineered for maximum reliability, the FS140 features advanced monitoring with LED indicators and audible alarms to notify users of system status and potential issues. Its Ground Reference Monitoring (GRM) technology detects improper grounding conditions, enhancing overall electrical safety. Built with a durable Type 4 / NEMA-rated enclosure, this unit is suitable for both indoor and outdoor installations.

Highlights

• 140kA surge protection capacity for maximum whole-home protection
• Ultra-fast response time (~1 nanosecond)
• Ground Reference Monitoring (GRM) detects wiring issues
• LED indicators and audible alarm for status monitoring
• Commercial-grade protection for residential applications
• Type 4 / NEMA enclosure for indoor or outdoor installation
• Protects entire electrical system including appliances and electronics
• Designed for panel-mounted installation

Specifications

Documents

• FirstSurge SPD Canadian Datasheet