Surge Protection Device SPD AC, model GSP912.5KAAC SPD Short description A 4pole circuit breaker type surge protection device designed for 220V installations. Provides transient overvoltage protection with selectable max continuous operating voltages and defined discharge current levels for both primary and secondary surge events. Key benefits Protects electrical equipment from transient overvoltage and surge events, reducing risk of equipment damage and downtime. 4pole design suited for threephase plus neutral power distribution, enabling fullline protection in multiphase systems. Circuit breaker form factor simplifies installation and replacement while allowing isolation of the SPD when required. discharge capacity for strong surge events, with separate ratings for different surge categories to match site requirements. option available to adapt to specific installation needs. Main specifications Model: GSP912.5KAAC SPD Type: Circuit breaker surge protector Size / variant: 4P 12.5KA 275VAC Rated voltage: 220V Max continuous operating AC voltage options: AC275V, AC385V, AC400V, AC440V Discharge current: T1 12.5KA, T2 20KA Is smart device: No Is customized: Yes Performance and compatibility Designed for standard 220V power systems and available for higher continuous operating voltages up to AC440V to match different network requirements. Dual discharge current specification supports coordination with upstream protection and layered surge protection strategies. Circuit breaker style integrates with distribution panels and switchboards for straightforward mounting and servicing. Typical applications Main distribution panels and subpanels in commercial buildings to protect lighting, HVAC, and general power circuits. Industrial control cabinets and motor control centers where threephase surge protection is required. Telecom and network infrastructure rooms or server closet distribution panels to limit surge exposure to sensitive equipment. Ordering and Model GSP912.5KAAC SPD can be supplied with configuration options for different max continuous operating voltages. Specify required operating voltage and discharge current coordination when ordering to ensure compatibility with your system.