SAE T120-DG DG-Series Low-Voltage Fire Alarm Surge Protector, 120V

Protect sensitive fire alarm, security and surveillance systems from damaging transients with the Space Age Electronics T120-DG DG-Series Low-Voltage Fire Alarm Surge Protector. This surge protection module is engineered for 120V AC fire-sector applications and combines Gas Discharge Tubes (GDT) with Silicone Avalanche Diodes (SAD) to provide both high-energy surge suppression and precise, low-capacitance clamping for sensitive monitoring electronics. The managed single-point ground and included 12 AWG ground strap ensure a stable ground reference—reducing nuisance alarms and preventing avoidable system failures. Designed for real-world serviceability, the T120-DG features scalable, field-swappable modules, pluggable screw terminals and multiple mounting options (panel, snap-track or DIN rail) so technicians can replace units quickly with minimal disruption. Built in a rugged polycarbonate case and made in the USA, it’s ideal for integration into fire, security, access control and CCTV systems that demand reliable transient protection. Specify the T120-DG for your next installation to protect critical monitoring and surveillance electronics—order or request a quote today.

• Protects critical fire alarm, security and monitoring equipment from damaging voltage transients to reduce nuisance alarms and downtime
• Hybrid GDT + SAD topology delivers fast clamping and high-energy surge protection while maintaining ultra-low line capacitance for sensitive electronics
• Single-point managed grounding with 12 AWG ground strap ensures a stable ground path and consistent performance across installations
• Scalable, field-swappable modules and pluggable screw terminals minimize service time and simplify on-site maintenance
• Flexible mounting (panel screw, snap track or DIN rail) and durable polycarbonate housing make it easy to integrate into existing fire and security infrastructures