RCCB, 4-pole, type A, In: 25 A, 30 mA, Un AC: 400 V, 50 to 400 Hz

Residual current operated circuit breaker, 4-pole, type A, In: 25 A, 30 mA, Un AC: 400 V, 50...400 Hz The RCD is the residual current device for touch protection https://www.siemens.com/global/en/home/products/energy/low-voltage/components/sentron-protection-devices/residual-current-protective-devices.html. Siemens offers a comprehensive portfolio of protection, switching, measuring and monitoring devices, distribution systems as well as switches and sockets for safe and efficient electrical infrastructure in buildings and industry.